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35741 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Yordan Karadzhov (VMware)
|
70d443d846 |
tracing: Remove duplicate declaration from trace.h
A declaration of function "int trace_empty(struct trace_iterator *iter)" shows up twice in the header file kernel/trace/trace.h Link: https://lkml.kernel.org/r/20210304092348.208033-1-y.karadz@gmail.com Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
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Linus Torvalds
|
3ab6608e66 |
block-5.12-2021-02-27
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|
Linus Torvalds
|
5695e51619 |
io_uring-worker.v3-2021-02-25
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Merge tag 'io_uring-worker.v3-2021-02-25' of git://git.kernel.dk/linux-block
Pull io_uring thread rewrite from Jens Axboe:
"This converts the io-wq workers to be forked off the tasks in question
instead of being kernel threads that assume various bits of the
original task identity.
This kills > 400 lines of code from io_uring/io-wq, and it's the worst
part of the code. We've had several bugs in this area, and the worry
is always that we could be missing some pieces for file types doing
unusual things (recent /dev/tty example comes to mind, userfaultfd
reads installing file descriptors is another fun one... - both of
which need special handling, and I bet it's not the last weird oddity
we'll find).
With these identical workers, we can have full confidence that we're
never missing anything. That, in itself, is a huge win. Outside of
that, it's also more efficient since we're not wasting space and code
on tracking state, or switching between different states.
I'm sure we're going to find little things to patch up after this
series, but testing has been pretty thorough, from the usual
regression suite to production. Any issue that may crop up should be
manageable.
There's also a nice series of further reductions we can do on top of
this, but I wanted to get the meat of it out sooner rather than later.
The general worry here isn't that it's fundamentally broken. Most of
the little issues we've found over the last week have been related to
just changes in how thread startup/exit is done, since that's the main
difference between using kthreads and these kinds of threads. In fact,
if all goes according to plan, I want to get this into the 5.10 and
5.11 stable branches as well.
That said, the changes outside of io_uring/io-wq are:
- arch setup, simple one-liner to each arch copy_thread()
implementation.
- Removal of net and proc restrictions for io_uring, they are no
longer needed or useful"
* tag 'io_uring-worker.v3-2021-02-25' of git://git.kernel.dk/linux-block: (30 commits)
io-wq: remove now unused IO_WQ_BIT_ERROR
io_uring: fix SQPOLL thread handling over exec
io-wq: improve manager/worker handling over exec
io_uring: ensure SQPOLL startup is triggered before error shutdown
io-wq: make buffered file write hashed work map per-ctx
io-wq: fix race around io_worker grabbing
io-wq: fix races around manager/worker creation and task exit
io_uring: ensure io-wq context is always destroyed for tasks
arch: ensure parisc/powerpc handle PF_IO_WORKER in copy_thread()
io_uring: cleanup ->user usage
io-wq: remove nr_process accounting
io_uring: flag new native workers with IORING_FEAT_NATIVE_WORKERS
net: remove cmsg restriction from io_uring based send/recvmsg calls
Revert "proc: don't allow async path resolution of /proc/self components"
Revert "proc: don't allow async path resolution of /proc/thread-self components"
io_uring: move SQPOLL thread io-wq forked worker
io-wq: make io_wq_fork_thread() available to other users
io-wq: only remove worker from free_list, if it was there
io_uring: remove io_identity
io_uring: remove any grabbing of context
...
|
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Linus Torvalds
|
5ceabb6078 |
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs updates from Al Viro: "Assorted stuff pile - no common topic here" * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: whack-a-mole: don't open-code iminor/imajor 9p: fix misuse of sscanf() in v9fs_stat2inode() audit_alloc_mark(): don't open-code ERR_CAST() fs/inode.c: make inode_init_always() initialize i_ino to 0 vfs: don't unnecessarily clone write access for writable fds |
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|
Linus Torvalds
|
ef9856a734 |
Merge branch 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
Pull swiotlb updates from Konrad Rzeszutek Wilk:
"Two memory encryption related patches (SWIOTLB is enabled by default
for AMD-SEV):
- Add support for alignment so that NVME can properly work
- Keep track of requested DMA buffers length, as underlaying hardware
devices can trip SWIOTLB to bounce too much and crash the kernel
And a tiny fix to use proper APIs in drivers"
* 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
swiotlb: Validate bounce size in the sync/unmap path
nvme-pci: set min_align_mask
swiotlb: respect min_align_mask
swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single
swiotlb: refactor swiotlb_tbl_map_single
swiotlb: clean up swiotlb_tbl_unmap_single
swiotlb: factor out a nr_slots helper
swiotlb: factor out an io_tlb_offset helper
swiotlb: add a IO_TLB_SIZE define
driver core: add a min_align_mask field to struct device_dma_parameters
sdhci: stop poking into swiotlb internals
|
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Jakub Kicinski
|
9e8e714f2d |
Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Alexei Starovoitov says: ==================== pull-request: bpf 2021-02-26 1) Fix for bpf atomic insns with src_reg=r0, from Brendan. 2) Fix use after free due to bpf_prog_clone, from Cong. 3) Drop imprecise verifier log message, from Dmitrii. 4) Remove incorrect blank line in bpf helper description, from Hangbin. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: selftests/bpf: No need to drop the packet when there is no geneve opt bpf: Remove blank line in bpf helper description comment tools/resolve_btfids: Fix build error with older host toolchains selftests/bpf: Fix a compiler warning in global func test bpf: Drop imprecise log message bpf: Clear percpu pointers in bpf_prog_clone_free() bpf: Fix a warning message in mark_ptr_not_null_reg() bpf, x86: Fix BPF_FETCH atomic and/or/xor with r0 as src ==================== Link: https://lore.kernel.org/r/20210226193737.57004-1-alexei.starovoitov@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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Linus Torvalds
|
8f47d753d4 |
arm64 fixes for -rc1
- Fix lockdep false alarm on resume-from-cpuidle path - Fix memory leak in kexec_file - Fix module linker script to work with GDB - Fix error code when trying to use uprobes with AArch32 instructions - Fix late VHE enabling with 64k pages - Add missing ISBs after TLB invalidation - Fix seccomp when tracing syscall -1 - Fix stacktrace return code at end of stack - Fix inconsistent whitespace for pointer return values - Fix compiler warnings when building with W=1 -----BEGIN PGP SIGNATURE----- iQFEBAABCgAuFiEEPxTL6PPUbjXGY88ct6xw3ITBYzQFAmA40kUQHHdpbGxAa2Vy bmVsLm9yZwAKCRC3rHDchMFjNLMUB/93o3Ucd3SeLLmOziyZMWjxCNcuzXAXDhFH z0q0Zq8U5+xHaCH+jPASNwS7gT6dMX8E60SlXcvVaHuBaH5zsrZnOtpJ5mZQAQ7E nR1M5ANfusMJ8uRpDHhy5ymJ4IcE/yn74rapBIeGs1e4vWF60Lb6nSVrEJMNRada zbRr2z9bMecQPGX+KSWpgYg4dLRpyTo8oSYJiYmyoSczGvXhrFHlnIJeaKrJuvGt IIhil8l9uZd5j0ucVWGiYgAcAuqzgkH2yEiNbkGRwn0nMK+4HGbXpEuzUm/90p3y lRLQSvx/hKwerIlodUYbFDx4FMXoFfMRQm/8/6tCBrUn/4exDslZ =wuLk -----END PGP SIGNATURE----- Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "The big one is a fix for the VHE enabling path during early boot, where the code enabling the MMU wasn't necessarily in the identity map of the new page-tables, resulting in a consistent crash with 64k pages. In fixing that, we noticed some missing barriers too, so we added those for the sake of architectural compliance. Other than that, just the usual merge window trickle. There'll be more to come, too. Summary: - Fix lockdep false alarm on resume-from-cpuidle path - Fix memory leak in kexec_file - Fix module linker script to work with GDB - Fix error code when trying to use uprobes with AArch32 instructions - Fix late VHE enabling with 64k pages - Add missing ISBs after TLB invalidation - Fix seccomp when tracing syscall -1 - Fix stacktrace return code at end of stack - Fix inconsistent whitespace for pointer return values - Fix compiler warnings when building with W=1" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: stacktrace: Report when we reach the end of the stack arm64: ptrace: Fix seccomp of traced syscall -1 (NO_SYSCALL) arm64: Add missing ISB after invalidating TLB in enter_vhe arm64: Add missing ISB after invalidating TLB in __primary_switch arm64: VHE: Enable EL2 MMU from the idmap KVM: arm64: make the hyp vector table entries local arm64/mm: Fixed some coding style issues arm64: uprobe: Return EOPNOTSUPP for AARCH32 instruction probing kexec: move machine_kexec_post_load() to public interface arm64 module: set plt* section addresses to 0x0 arm64: kexec_file: fix memory leakage in create_dtb() when fdt_open_into() fails arm64: spectre: Prevent lockdep splat on v4 mitigation enable path |
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Sumit Garg
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d54ce6158e |
kgdb: fix to kill breakpoints on initmem after boot
Currently breakpoints in kernel .init.text section are not handled correctly while allowing to remove them even after corresponding pages have been freed. Fix it via killing .init.text section breakpoints just prior to initmem pages being freed. Doug: "HW breakpoints aren't handled by this patch but it's probably not such a big deal". Link: https://lkml.kernel.org/r/20210224081652.587785-1-sumit.garg@linaro.org Signed-off-by: Sumit Garg <sumit.garg@linaro.org> Suggested-by: Doug Anderson <dianders@chromium.org> Acked-by: Doug Anderson <dianders@chromium.org> Acked-by: Daniel Thompson <daniel.thompson@linaro.org> Tested-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Randy Dunlap
|
c034f48e99 |
kernel: delete repeated words in comments
Drop repeated words in kernel/events/.
{if, the, that, with, time}
Drop repeated words in kernel/locking/.
{it, no, the}
Drop repeated words in kernel/sched/.
{in, not}
Link: https://lkml.kernel.org/r/20210127023412.26292-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Will Deacon <will@kernel.org> [kernel/locking/]
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Hubert Jasudowicz
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e1e014115d |
groups: simplify struct group_info allocation
Combine kmalloc and vmalloc into a single call. Use struct_size macro instead of direct size calculation. Link: https://lkml.kernel.org/r/ba9ba5beea9a44b7196c41a0d9528abd5f20dd2e.1611620846.git.hubert.jasudowicz@gmail.com Signed-off-by: Hubert Jasudowicz <hubert.jasudowicz@gmail.com> Cc: Gao Xiang <xiang@kernel.org> Cc: Micah Morton <mortonm@chromium.org> Cc: Michael Kelley <mikelley@microsoft.com> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org> Cc: Thomas Cedeno <thomascedeno@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Lin Feng
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3b3376f222 |
sysctl.c: fix underflow value setting risk in vm_table
Apart from subsystem specific .proc_handler handler, all ctl_tables with extra1 and extra2 members set should use proc_dointvec_minmax instead of proc_dointvec, or the limit set in extra* never work and potentially echo underflow values(negative numbers) is likely make system unstable. Especially vfs_cache_pressure and zone_reclaim_mode, -1 is apparently not a valid value, but we can set to them. And then kernel may crash. # echo -1 > /proc/sys/vm/vfs_cache_pressure Link: https://lkml.kernel.org/r/20201223105535.2875-1-linf@wangsu.com Signed-off-by: Lin Feng <linf@wangsu.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Alexander Potapenko
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9c0dee54eb |
tracing: add error_report_end trace point
Patch series "Add error_report_end tracepoint to KFENCE and KASAN", v3. This patchset adds a tracepoint, error_repor_end, that is to be used by KFENCE, KASAN, and potentially other bug detection tools, when they print an error report. One of the possible use cases is userspace collection of kernel error reports: interested parties can subscribe to the tracing event via tracefs, and get notified when an error report occurs. This patch (of 3): Introduce error_report_end tracepoint. It can be used in debugging tools like KASAN, KFENCE, etc. to provide extensions to the error reporting mechanisms (e.g. allow tests hook into error reporting, ease error report collection from production kernels). Another benefit would be making use of ftrace for debugging or benchmarking the tools themselves. Should we need it, the tracepoint name leaves us with the possibility to introduce a complementary error_report_start tracepoint in the future. Link: https://lkml.kernel.org/r/20210121131915.1331302-1-glider@google.com Link: https://lkml.kernel.org/r/20210121131915.1331302-2-glider@google.com Signed-off-by: Alexander Potapenko <glider@google.com> Suggested-by: Marco Elver <elver@google.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Martin Radev
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daf9514fd5 |
swiotlb: Validate bounce size in the sync/unmap path
The size of the buffer being bounced is not checked if it happens to be larger than the size of the mapped buffer. Because the size can be controlled by a device, as it's the case with virtio devices, this can lead to memory corruption. This patch saves the remaining buffer memory for each slab and uses that information for validation in the sync/unmap paths before swiotlb_bounce is called. Validating this argument is important under the threat models of AMD SEV-SNP and Intel TDX, where the HV is considered untrusted. Signed-off-by: Martin Radev <martin.b.radev@gmail.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
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Christoph Hellwig
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1f221a0d0d |
swiotlb: respect min_align_mask
Respect the min_align_mask in struct device_dma_parameters in swiotlb.
There are two parts to it:
1) for the lower bits of the alignment inside the io tlb slot, just
extent the size of the allocation and leave the start of the slot
empty
2) for the high bits ensure we find a slot that matches the high bits
of the alignment to avoid wasting too much memory
Based on an earlier patch from Jianxiong Gao <jxgao@google.com>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jianxiong Gao <jxgao@google.com>
Tested-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Linus Torvalds
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6fbd6cf85a |
Kbuild updates for v5.12
- Fix false-positive build warnings for ARCH=ia64 builds
- Optimize dictionary size for module compression with xz
- Check the compiler and linker versions in Kconfig
- Fix misuse of extra-y
- Support DWARF v5 debug info
- Clamp SUBLEVEL to 255 because stable releases 4.4.x and 4.9.x
exceeded the limit
- Add generic syscall{tbl,hdr}.sh for cleanups across arches
- Minor cleanups of genksyms
- Minor cleanups of Kconfig
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Merge tag 'kbuild-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Fix false-positive build warnings for ARCH=ia64 builds
- Optimize dictionary size for module compression with xz
- Check the compiler and linker versions in Kconfig
- Fix misuse of extra-y
- Support DWARF v5 debug info
- Clamp SUBLEVEL to 255 because stable releases 4.4.x and 4.9.x
exceeded the limit
- Add generic syscall{tbl,hdr}.sh for cleanups across arches
- Minor cleanups of genksyms
- Minor cleanups of Kconfig
* tag 'kbuild-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (38 commits)
initramfs: Remove redundant dependency of RD_ZSTD on BLK_DEV_INITRD
kbuild: remove deprecated 'always' and 'hostprogs-y/m'
kbuild: parse C= and M= before changing the working directory
kbuild: reuse this-makefile to define abs_srctree
kconfig: unify rule of config, menuconfig, nconfig, gconfig, xconfig
kconfig: omit --oldaskconfig option for 'make config'
kconfig: fix 'invalid option' for help option
kconfig: remove dead code in conf_askvalue()
kconfig: clean up nested if-conditionals in check_conf()
kconfig: Remove duplicate call to sym_get_string_value()
Makefile: Remove # characters from compiler string
Makefile: reuse CC_VERSION_TEXT
kbuild: check the minimum linker version in Kconfig
kbuild: remove ld-version macro
scripts: add generic syscallhdr.sh
scripts: add generic syscalltbl.sh
arch: syscalls: remove $(srctree)/ prefix from syscall tables
arch: syscalls: add missing FORCE and fix 'targets' to make if_changed work
gen_compile_commands: prune some directories
kbuild: simplify access to the kernel's version
...
|
||
|
Linus Torvalds
|
29c395c77a |
Rework of the X86 irq stack handling:
The irq stack switching was moved out of the ASM entry code in course of
the entry code consolidation. It ended up being suboptimal in various
ways.
- Make the stack switching inline so the stackpointer manipulation is not
longer at an easy to find place.
- Get rid of the unnecessary indirect call.
- Avoid the double stack switching in interrupt return and reuse the
interrupt stack for softirq handling.
- A objtool fix for CONFIG_FRAME_POINTER=y builds where it got confused
about the stack pointer manipulation.
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Merge tag 'x86-entry-2021-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 irq entry updates from Thomas Gleixner:
"The irq stack switching was moved out of the ASM entry code in course
of the entry code consolidation. It ended up being suboptimal in
various ways.
This reworks the X86 irq stack handling:
- Make the stack switching inline so the stackpointer manipulation is
not longer at an easy to find place.
- Get rid of the unnecessary indirect call.
- Avoid the double stack switching in interrupt return and reuse the
interrupt stack for softirq handling.
- A objtool fix for CONFIG_FRAME_POINTER=y builds where it got
confused about the stack pointer manipulation"
* tag 'x86-entry-2021-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Fix stack-swizzle for FRAME_POINTER=y
um: Enforce the usage of asm-generic/softirq_stack.h
x86/softirq/64: Inline do_softirq_own_stack()
softirq: Move do_softirq_own_stack() to generic asm header
softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig
x86: Select CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK
x86/softirq: Remove indirection in do_softirq_own_stack()
x86/entry: Use run_sysvec_on_irqstack_cond() for XEN upcall
x86/entry: Convert device interrupts to inline stack switching
x86/entry: Convert system vectors to irq stack macro
x86/irq: Provide macro for inlining irq stack switching
x86/apic: Split out spurious handling code
x86/irq/64: Adjust the per CPU irq stack pointer by 8
x86/irq: Sanitize irq stack tracking
x86/entry: Fix instrumentation annotation
|
||
|
Linus Torvalds
|
7ac1161c27 |
Driver core / debugfs update for 5.12-rc1
Here is the "big" driver core and debugfs update for 5.12-rc1
This set of driver core patches caused a bunch of problems in linux-next
for the past few weeks, when Saravana tried to set fw_devlink=on as the
default functionality. This caused a number of systems to stop booting,
and lots of bugs were fixed in this area for almost all of the reported
systems, but this option is not ready to be turned on just yet for the
default operation based on this testing, so I've reverted that change at
the very end so we don't have to worry about regressions in 5.12. We
will try to turn this on for 5.13 if testing goes better over the next
few months.
Other than the fixes caused by the fw_devlink testing in here, there's
not much more:
- debugfs fixes for invalid input into debugfs_lookup()
- kerneldoc cleanups
- warn message if platform drivers return an error on their
remove callback (a futile effort, but good to catch).
All of these have been in linux-next for a while now, and the
regressions have gone away with the revert of the fw_devlink change.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core / debugfs update from Greg KH:
"Here is the "big" driver core and debugfs update for 5.12-rc1
This set of driver core patches caused a bunch of problems in
linux-next for the past few weeks, when Saravana tried to set
fw_devlink=on as the default functionality. This caused a number of
systems to stop booting, and lots of bugs were fixed in this area for
almost all of the reported systems, but this option is not ready to be
turned on just yet for the default operation based on this testing, so
I've reverted that change at the very end so we don't have to worry
about regressions in 5.12
We will try to turn this on for 5.13 if testing goes better over the
next few months.
Other than the fixes caused by the fw_devlink testing in here, there's
not much more:
- debugfs fixes for invalid input into debugfs_lookup()
- kerneldoc cleanups
- warn message if platform drivers return an error on their remove
callback (a futile effort, but good to catch).
All of these have been in linux-next for a while now, and the
regressions have gone away with the revert of the fw_devlink change"
* tag 'driver-core-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (35 commits)
Revert "driver core: Set fw_devlink=on by default"
of: property: fw_devlink: Ignore interrupts property for some configs
debugfs: do not attempt to create a new file before the filesystem is initalized
debugfs: be more robust at handling improper input in debugfs_lookup()
driver core: auxiliary bus: Fix calling stage for auxiliary bus init
of: irq: Fix the return value for of_irq_parse_one() stub
of: irq: make a stub for of_irq_parse_one()
clk: Mark fwnodes when their clock provider is added/removed
PM: domains: Mark fwnodes when their powerdomain is added/removed
irqdomain: Mark fwnodes when their irqdomain is added/removed
driver core: fw_devlink: Handle suppliers that don't use driver core
of: property: Add fw_devlink support for optional properties
driver core: Add fw_devlink.strict kernel param
of: property: Don't add links to absent suppliers
driver core: fw_devlink: Detect supplier devices that will never be added
driver core: platform: Emit a warning if a remove callback returned non-zero
of: property: Fix fw_devlink handling of interrupts/interrupts-extended
gpiolib: Don't probe gpio_device if it's not the primary device
device.h: Remove bogus "the" in kerneldoc
gpiolib: Bind gpio_device to a driver to enable fw_devlink=on by default
...
|
||
|
Linus Torvalds
|
a4dec04c7f |
dma-mapping updates for 5.12:
- add support to emulate processing delays in the DMA API benchmark
selftest (Barry Song)
- remove support for non-contiguous noncoherent allocations,
which aren't used and will be replaced by a different API
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Merge tag 'dma-mapping-5.12' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig:
- add support to emulate processing delays in the DMA API benchmark
selftest (Barry Song)
- remove support for non-contiguous noncoherent allocations, which
aren't used and will be replaced by a different API
* tag 'dma-mapping-5.12' of git://git.infradead.org/users/hch/dma-mapping:
dma-mapping: remove the {alloc,free}_noncoherent methods
dma-mapping: benchmark: pretend DMA is transmitting
|
||
Chaitanya Kulkarni
|
94d4bffdda |
blktrace: fix documentation for blk_fill_rw()
Add missing ":" after rwbs function parameter documentation that fixes
following warning :-
./kernel/trace/blktrace.c:1877: warning: Function parameter or member 'rwbs' not described in 'blk_fill_rwbs'
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes:
|
||
Dmitrii Banshchikov
|
f4eda8b6e4 |
bpf: Drop imprecise log message
Now it is possible for global function to have a pointer argument that
points to something different than struct. Drop the irrelevant log
message and keep the logic same.
Fixes:
|
||
|
Linus Torvalds
|
c03c21ba6f |
Keyrings miscellany
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Merge tag 'keys-misc-20210126' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull keyring updates from David Howells:
"Here's a set of minor keyrings fixes/cleanups that I've collected from
various people for the upcoming merge window.
A couple of them might, in theory, be visible to userspace:
- Make blacklist_vet_description() reject uppercase letters as they
don't match the all-lowercase hex string generated for a blacklist
search.
This may want reconsideration in the future, but, currently, you
can't add to the blacklist keyring from userspace and the only
source of blacklist keys generates lowercase descriptions.
- Fix blacklist_init() to use a new KEY_ALLOC_* flag to indicate that
it wants KEY_FLAG_KEEP to be set rather than passing KEY_FLAG_KEEP
into keyring_alloc() as KEY_FLAG_KEEP isn't a valid alloc flag.
This isn't currently a problem as the blacklist keyring isn't
currently writable by userspace.
The rest of the patches are cleanups and I don't think they should
have any visible effect"
* tag 'keys-misc-20210126' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
watch_queue: rectify kernel-doc for init_watch()
certs: Replace K{U,G}IDT_INIT() with GLOBAL_ROOT_{U,G}ID
certs: Fix blacklist flag type confusion
PKCS#7: Fix missing include
certs: Fix blacklisted hexadecimal hash string check
certs/blacklist: fix kernel doc interface issue
crypto: public_key: Remove redundant header file from public_key.h
keys: remove trailing semicolon in macro definition
crypto: pkcs7: Use match_string() helper to simplify the code
PKCS#7: drop function from kernel-doc pkcs7_validate_trust_one
encrypted-keys: Replace HTTP links with HTTPS ones
crypto: asymmetric_keys: fix some comments in pkcs7_parser.h
KEYS: remove redundant memset
security: keys: delete repeated words in comments
KEYS: asymmetric: Fix kerneldoc
security/keys: use kvfree_sensitive()
watch_queue: Drop references to /dev/watch_queue
keys: Remove outdated __user annotations
security: keys: Fix fall-through warnings for Clang
|
||
|
Linus Torvalds
|
414eece95b |
clang-lto for v5.12-rc1 (part2)
- Generate __mcount_loc in objtool (Peter Zijlstra) - Support running objtool against vmlinux.o (Sami Tolvanen) - Clang LTO enablement for x86 (Sami Tolvanen) -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmA1fn8ACgkQiXL039xt wCbswQ//Zmnq912Ubyn5uPe9SOS/kumGDoqtxGzlZwo/pSB3qFArhD6G07sJ49XD nu/05ZcOda760wubnhcuK91n2fY5i/eGLXMSjfgtdVcco4Q67nPQydc+LGdhuDco FlhL8TAIwqYN1f2nJK1IggZpZFxz5r/r1Pq8q1S0oQRqDenxDBQwNtBba4B1OIxw /FE/1Hp3xwRnuJEP2jREBeY1yQ+Y1n859pZcDgSOWlTArcp8EVUi5hIWJ9DwIe73 mqnx6PcFWEYB0zLNZmZz2gpEac+ncGyme6ChayeuQfInbL5dhx97jFGt3S6/+NSY mF2zyaR/+JsGGuM8dVqH3izKCJXCEAGirrdMO1ndb9HdwS3KnYEiag2ciNWL0wm3 UEM4r0i2B14sU3pkyotKgsJdOSgorMKkQUPb2wW+OUfnkZNEWKLqylMgNXBD80l4 WG5vYQRwwFN9jRBik6Z5YFGnwGsNIoGg1F1GRNMjh6h51adYQeBN/1QJE1FJ5L4D iKzmZYqimKUINXWfI6TNyqiv9TctOt65pxnRyq+MHxfTDzHGyc3MUeCeCiR1a1yI S5QhcgfSnC/NjDA0+oYC6yRlcBtfhjtUqFTGoZ4q4q/LF1BVU1bPyIXZrROLc05s LNMMBcWbJetJxFtm/gYfiVFuNitYtxbBV1krVtsWznCA2nKGJ9w= =htKJ -----END PGP SIGNATURE----- Merge tag 'clang-lto-v5.12-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull more clang LTO updates from Kees Cook: "Clang LTO x86 enablement. Full disclosure: while this has _not_ been in linux-next (since it initially looked like the objtool dependencies weren't going to make v5.12), it has been under daily build and runtime testing by Sami for quite some time. These x86 portions have been discussed on lkml, with Peter, Josh, and others helping nail things down. The bulk of the changes are to get objtool working happily. The rest of the x86 enablement is very small. Summary: - Generate __mcount_loc in objtool (Peter Zijlstra) - Support running objtool against vmlinux.o (Sami Tolvanen) - Clang LTO enablement for x86 (Sami Tolvanen)" Link: https://lore.kernel.org/lkml/20201013003203.4168817-26-samitolvanen@google.com/ Link: https://lore.kernel.org/lkml/cover.1611263461.git.jpoimboe@redhat.com/ * tag 'clang-lto-v5.12-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: kbuild: lto: force rebuilds when switching CONFIG_LTO x86, build: allow LTO to be selected x86, cpu: disable LTO for cpu.c x86, vdso: disable LTO only for vDSO kbuild: lto: postpone objtool objtool: Split noinstr validation from --vmlinux x86, build: use objtool mcount tracing: add support for objtool mcount objtool: Don't autodetect vmlinux.o objtool: Fix __mcount_loc generation with Clang's assembler objtool: Add a pass for generating __mcount_loc |
||
|
Linus Torvalds
|
005d3bd9e3 |
More power management updates for 5.12-rc1
- Address cpufreq regression introduced in 5.11 that causes
CPU frequency reporting to be distorted on systems with CPPC
that use acpi-cpufreq as the scaling driver (Rafael Wysocki).
- Fix regression introduced during the 5.10 development cycle
related to CPU hotplug and policy recreation in the
qcom-cpufreq-hw driver (Shawn Guo).
- Fix recent regression in the operating performance points (OPP)
framework that may cause frequency updates to be skipped by
mistake in some cases (Jonathan Marek).
- Simplify schedutil governor code and remove a misleading comment
from it (Yue Hu).
- Fix kerneldoc comment typo in the cpufreq core (Yue Hu).
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Merge tag 'pm-5.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These are fixes and cleanups on top of the power management material
for 5.12-rc1 merged previously.
Specifics:
- Address cpufreq regression introduced in 5.11 that causes CPU
frequency reporting to be distorted on systems with CPPC that use
acpi-cpufreq as the scaling driver (Rafael Wysocki).
- Fix regression introduced during the 5.10 development cycle related
to CPU hotplug and policy recreation in the qcom-cpufreq-hw driver
(Shawn Guo).
- Fix recent regression in the operating performance points (OPP)
framework that may cause frequency updates to be skipped by mistake
in some cases (Jonathan Marek).
- Simplify schedutil governor code and remove a misleading comment
from it (Yue Hu).
- Fix kerneldoc comment typo in the cpufreq core (Yue Hu)"
* tag 'pm-5.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: Fix typo in kerneldoc comment
cpufreq: schedutil: Remove update_lock comment from struct sugov_policy definition
cpufreq: schedutil: Remove needless sg_policy parameter from ignore_dl_rate_limit()
cpufreq: ACPI: Set cpuinfo.max_freq directly if max boost is known
cpufreq: qcom-hw: drop devm_xxx() calls from init/exit hooks
opp: Don't skip freq update for different frequency
|
||
|
Linus Torvalds
|
7d6beb71da |
idmapped-mounts-v5.12
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Merge tag 'idmapped-mounts-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull idmapped mounts from Christian Brauner:
"This introduces idmapped mounts which has been in the making for some
time. Simply put, different mounts can expose the same file or
directory with different ownership. This initial implementation comes
with ports for fat, ext4 and with Christoph's port for xfs with more
filesystems being actively worked on by independent people and
maintainers.
Idmapping mounts handle a wide range of long standing use-cases. Here
are just a few:
- Idmapped mounts make it possible to easily share files between
multiple users or multiple machines especially in complex
scenarios. For example, idmapped mounts will be used in the
implementation of portable home directories in
systemd-homed.service(8) where they allow users to move their home
directory to an external storage device and use it on multiple
computers where they are assigned different uids and gids. This
effectively makes it possible to assign random uids and gids at
login time.
- It is possible to share files from the host with unprivileged
containers without having to change ownership permanently through
chown(2).
- It is possible to idmap a container's rootfs and without having to
mangle every file. For example, Chromebooks use it to share the
user's Download folder with their unprivileged containers in their
Linux subsystem.
- It is possible to share files between containers with
non-overlapping idmappings.
- Filesystem that lack a proper concept of ownership such as fat can
use idmapped mounts to implement discretionary access (DAC)
permission checking.
- They allow users to efficiently changing ownership on a per-mount
basis without having to (recursively) chown(2) all files. In
contrast to chown (2) changing ownership of large sets of files is
instantenous with idmapped mounts. This is especially useful when
ownership of a whole root filesystem of a virtual machine or
container is changed. With idmapped mounts a single syscall
mount_setattr syscall will be sufficient to change the ownership of
all files.
- Idmapped mounts always take the current ownership into account as
idmappings specify what a given uid or gid is supposed to be mapped
to. This contrasts with the chown(2) syscall which cannot by itself
take the current ownership of the files it changes into account. It
simply changes the ownership to the specified uid and gid. This is
especially problematic when recursively chown(2)ing a large set of
files which is commong with the aforementioned portable home
directory and container and vm scenario.
- Idmapped mounts allow to change ownership locally, restricting it
to specific mounts, and temporarily as the ownership changes only
apply as long as the mount exists.
Several userspace projects have either already put up patches and
pull-requests for this feature or will do so should you decide to pull
this:
- systemd: In a wide variety of scenarios but especially right away
in their implementation of portable home directories.
https://systemd.io/HOME_DIRECTORY/
- container runtimes: containerd, runC, LXD:To share data between
host and unprivileged containers, unprivileged and privileged
containers, etc. The pull request for idmapped mounts support in
containerd, the default Kubernetes runtime is already up for quite
a while now: https://github.com/containerd/containerd/pull/4734
- The virtio-fs developers and several users have expressed interest
in using this feature with virtual machines once virtio-fs is
ported.
- ChromeOS: Sharing host-directories with unprivileged containers.
I've tightly synced with all those projects and all of those listed
here have also expressed their need/desire for this feature on the
mailing list. For more info on how people use this there's a bunch of
talks about this too. Here's just two recent ones:
https://www.cncf.io/wp-content/uploads/2020/12/Rootless-Containers-in-Gitpod.pdf
https://fosdem.org/2021/schedule/event/containers_idmap/
This comes with an extensive xfstests suite covering both ext4 and
xfs:
https://git.kernel.org/brauner/xfstests-dev/h/idmapped_mounts
It covers truncation, creation, opening, xattrs, vfscaps, setid
execution, setgid inheritance and more both with idmapped and
non-idmapped mounts. It already helped to discover an unrelated xfs
setgid inheritance bug which has since been fixed in mainline. It will
be sent for inclusion with the xfstests project should you decide to
merge this.
In order to support per-mount idmappings vfsmounts are marked with
user namespaces. The idmapping of the user namespace will be used to
map the ids of vfs objects when they are accessed through that mount.
By default all vfsmounts are marked with the initial user namespace.
The initial user namespace is used to indicate that a mount is not
idmapped. All operations behave as before and this is verified in the
testsuite.
Based on prior discussions we want to attach the whole user namespace
and not just a dedicated idmapping struct. This allows us to reuse all
the helpers that already exist for dealing with idmappings instead of
introducing a whole new range of helpers. In addition, if we decide in
the future that we are confident enough to enable unprivileged users
to setup idmapped mounts the permission checking can take into account
whether the caller is privileged in the user namespace the mount is
currently marked with.
The user namespace the mount will be marked with can be specified by
passing a file descriptor refering to the user namespace as an
argument to the new mount_setattr() syscall together with the new
MOUNT_ATTR_IDMAP flag. The system call follows the openat2() pattern
of extensibility.
The following conditions must be met in order to create an idmapped
mount:
- The caller must currently have the CAP_SYS_ADMIN capability in the
user namespace the underlying filesystem has been mounted in.
- The underlying filesystem must support idmapped mounts.
- The mount must not already be idmapped. This also implies that the
idmapping of a mount cannot be altered once it has been idmapped.
- The mount must be a detached/anonymous mount, i.e. it must have
been created by calling open_tree() with the OPEN_TREE_CLONE flag
and it must not already have been visible in the filesystem.
The last two points guarantee easier semantics for userspace and the
kernel and make the implementation significantly simpler.
By default vfsmounts are marked with the initial user namespace and no
behavioral or performance changes are observed.
The manpage with a detailed description can be found here:
|
||
Sami Tolvanen
|
22c8542d7b |
tracing: add support for objtool mcount
This change adds build support for using objtool to generate __mcount_loc sections. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> |
||
Rafael J. Wysocki
|
08c2a406b9 |
Merge branches 'pm-cpufreq' and 'pm-opp'
* pm-cpufreq: cpufreq: Fix typo in kerneldoc comment cpufreq: schedutil: Remove update_lock comment from struct sugov_policy definition cpufreq: schedutil: Remove needless sg_policy parameter from ignore_dl_rate_limit() cpufreq: ACPI: Set cpuinfo.max_freq directly if max boost is known cpufreq: qcom-hw: drop devm_xxx() calls from init/exit hooks * pm-opp: opp: Don't skip freq update for different frequency |
||
|
Linus Torvalds
|
21a6ab2131 |
Modules updates for v5.12
Summary of modules changes for the 5.12 merge window:
- Retire EXPORT_UNUSED_SYMBOL() and EXPORT_SYMBOL_GPL_FUTURE(). These export
types were introduced between 2006 - 2008. All the of the unused symbols have
been long removed and gpl future symbols were converted to gpl quite a long
time ago, and I don't believe these export types have been used ever since.
So, I think it should be safe to retire those export types now. (Christoph Hellwig)
- Refactor and clean up some aged code cruft in the module loader (Christoph Hellwig)
- Build {,module_}kallsyms_on_each_symbol only when livepatching is enabled, as
it is the only caller (Christoph Hellwig)
- Unexport find_module() and module_mutex and fix the last module
callers to not rely on these anymore. Make module_mutex internal to
the module loader. (Christoph Hellwig)
- Harden ELF checks on module load and validate ELF structures before checking
the module signature (Frank van der Linden)
- Fix undefined symbol warning for clang (Fangrui Song)
- Fix smatch warning (Dan Carpenter)
Signed-off-by: Jessica Yu <jeyu@kernel.org>
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Merge tag 'modules-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull module updates from Jessica Yu:
- Retire EXPORT_UNUSED_SYMBOL() and EXPORT_SYMBOL_GPL_FUTURE(). These
export types were introduced between 2006 - 2008. All the of the
unused symbols have been long removed and gpl future symbols were
converted to gpl quite a long time ago, and I don't believe these
export types have been used ever since. So, I think it should be safe
to retire those export types now (Christoph Hellwig)
- Refactor and clean up some aged code cruft in the module loader
(Christoph Hellwig)
- Build {,module_}kallsyms_on_each_symbol only when livepatching is
enabled, as it is the only caller (Christoph Hellwig)
- Unexport find_module() and module_mutex and fix the last module
callers to not rely on these anymore. Make module_mutex internal to
the module loader (Christoph Hellwig)
- Harden ELF checks on module load and validate ELF structures before
checking the module signature (Frank van der Linden)
- Fix undefined symbol warning for clang (Fangrui Song)
- Fix smatch warning (Dan Carpenter)
* tag 'modules-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
module: potential uninitialized return in module_kallsyms_on_each_symbol()
module: remove EXPORT_UNUSED_SYMBOL*
module: remove EXPORT_SYMBOL_GPL_FUTURE
module: move struct symsearch to module.c
module: pass struct find_symbol_args to find_symbol
module: merge each_symbol_section into find_symbol
module: remove each_symbol_in_section
module: mark module_mutex static
kallsyms: only build {,module_}kallsyms_on_each_symbol when required
kallsyms: refactor {,module_}kallsyms_on_each_symbol
module: use RCU to synchronize find_module
module: unexport find_module and module_mutex
drm: remove drm_fb_helper_modinit
powerpc/powernv: remove get_cxl_module
module: harden ELF info handling
module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for undefined symbols
|
||
|
Linus Torvalds
|
79db4d2293 |
clang-lto series for v5.12-rc1
- Clang LTO build infrastructure and arm64-specific enablement (Sami Tolvanen)
- Recursive build CC_FLAGS_LTO fix (Alexander Lobakin)
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Merge tag 'clang-lto-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull clang LTO updates from Kees Cook:
"Clang Link Time Optimization.
This is built on the work done preparing for LTO by arm64 folks,
tracing folks, etc. This includes the core changes as well as the
remaining pieces for arm64 (LTO has been the default build method on
Android for about 3 years now, as it is the prerequisite for the
Control Flow Integrity protections).
While x86 LTO enablement is done, it depends on some pending objtool
clean-ups. It's possible that I'll send a "part 2" pull request for
LTO that includes x86 support.
For merge log posterity, and as detailed in commit
|
||
Greg Kroah-Hartman
|
c0ea57608b |
blktrace: remove debugfs file dentries from struct blk_trace
These debugfs dentries do not need to be saved for anything as the whole directory and everything in it is properly cleaned up when the parent directory is removed. So remove them from struct blk_trace and don't save them when created as it's not necessary. Cc: Jens Axboe <axboe@kernel.dk> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-block@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
Al Viro
|
b1adbdbda4 |
audit_alloc_mark(): don't open-code ERR_CAST()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|
Linus Torvalds
|
e913a8cdc2 |
Fixes around VM_FPNMAP and follow_pfn
- replace mm/frame_vector.c by get_user_pages in misc/habana and
drm/exynos drivers, then move that into media as it's sole user
- close race in generic_access_phys
- s390 pci ioctl fix of this series landed in 5.11 already
- properly revoke iomem mappings (/dev/mem, pci files)
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Merge tag 'topic/iomem-mmap-vs-gup-2021-02-22' of git://anongit.freedesktop.org/drm/drm
Pull follow_pfn() updates from Daniel Vetter:
"Fixes around VM_FPNMAP and follow_pfn:
- replace mm/frame_vector.c by get_user_pages in misc/habana and
drm/exynos drivers, then move that into media as it's sole user
- close race in generic_access_phys
- s390 pci ioctl fix of this series landed in 5.11 already
- properly revoke iomem mappings (/dev/mem, pci files)"
* tag 'topic/iomem-mmap-vs-gup-2021-02-22' of git://anongit.freedesktop.org/drm/drm:
PCI: Revoke mappings like devmem
PCI: Also set up legacy files only after sysfs init
sysfs: Support zapping of binary attr mmaps
resource: Move devmem revoke code to resource framework
/dev/mem: Only set filp->f_mapping
PCI: Obey iomem restrictions for procfs mmap
mm: Close race in generic_access_phys
media: videobuf2: Move frame_vector into media subsystem
mm/frame-vector: Use FOLL_LONGTERM
misc/habana: Use FOLL_LONGTERM for userptr
misc/habana: Stop using frame_vector helpers
drm/exynos: Use FOLL_LONGTERM for g2d cmdlists
drm/exynos: Stop using frame_vector helpers
|
||
|
Linus Torvalds
|
4b5f9254e4 |
kconfig for kcmp syscall
drm userspaces uses this, systemd uses this, makes sense to pull it out from the checkpoint-restore bundle. Kees reviewed this from security pov and is happy with the final version. LWN coverage: https://lwn.net/Articles/845448/ -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEb4nG6jLu8Y5XI+PfTA9ye/CYqnEFAmAzaXIACgkQTA9ye/CY qnH5FQ//eL/7a/PDICuCRIN2p2aQwHoe9d12q+01RolAgce6F9mR9SFiKGSCR+t7 daw4G/BaGxSYzvz1IqWbXDMhN87jAXV/IGs9k4OkSIcbnDmMY78EKMZB1c1t7AZo zmeAuQvmTAcBogTwC6IE9N1JwhH3fmudq4p8zZ4zLojJNSPjrwCvF/xQI/Yaw52V CTfni8mrjYJ+pZ1qn9XP3IceAFEEI27ubZj2DJU+5xpRJAdIAobo0XbVOf8XQ0uc /BRLyXFS66EDsY1wWHT6y6UXDNZgbLic0olC1aielaBJh+Wq6bQHgephxpasU5y7 cZX7XTX2N1q8j8NmgzWLYRgERqtXv0CPHKdimTs8SaUcPDGhxcnwPR6hmdQEC+i6 IjntWMERjfuyD+s6qVuc7s8WS7+Ry9OxgdVskHASqGpBvsSliXN1o02Am6WUuGsB HZxTjCe967FyL4LGU0YjobMTUUSWfYQkOBKABlvYUySNZ0ZHnSygHIWiWjC6b89A KmXiHJoocNfDlKwX6bf3OWQ+dGGFu2wo5wYzldIiqYJVidp50xdOosdRE1R6WwuG IOLCdNKdqDgtig+90/fFZ06liXZvqUdDafWgUs/g6lLquFrcq5aAIiSdR6PcPKB0 MwfWcCglLtYrxgDHvNaqnW18yRQq2TGbe+A65aXzLPp45pKP8Hk= =uiSj -----END PGP SIGNATURE----- Merge tag 'topic/kcmp-kconfig-2021-02-22' of git://anongit.freedesktop.org/drm/drm Pull kcmp kconfig update from Daniel Vetter: "Make the kcmp syscall available independently of checkpoint/restore. drm userspaces uses this, systemd uses this, so makes sense to pull it out from the checkpoint-restore bundle. Kees reviewed this from security pov and is happy with the final version" Link: https://lwn.net/Articles/845448/ * tag 'topic/kcmp-kconfig-2021-02-22' of git://anongit.freedesktop.org/drm/drm: kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE |
||
|
Linus Torvalds
|
ac9e806c9c |
Merge branch 'for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull qorkqueue updates from Tejun Heo: "Tracepoint and comment updates only" * 'for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: Use %s instead of function name workqueue: tracing the name of the workqueue instead of it's address workqueue: fix annotation for WQ_SYSFS |
||
|
Linus Torvalds
|
4b3bd22b12 |
Merge branch 'for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
"Nothing interesting. Just two minor patches"
* 'for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cpuset: fix typos in comments
cgroup: cgroup.{procs,threads} factor out common parts
|
||
|
Linus Torvalds
|
c958423470 |
Tracing updates for 5.12
- Update to the way irqs and preemption is tracked via the trace event PC field
- Fix handling of unregistering event failing due to allocate memory.
This is only triggered by failure injection, as it is pretty much guaranteed
to have less than a page allocation succeed.
- Do not show the useless "filter" or "enable" files for the "ftrace" trace
system, as they have no effect on doing anything.
- Add a warning if kprobes are registered more than once.
- Synthetic events now have their fields parsed by semicolons.
Old formats without semicolons will still work, but new features will
require them.
- New option to allow trace events to show %p without hashing in trace file.
The trace file can only be read by root, and reading the raw event buffer
did not have any pointers hashed, so this does not expose anything new.
- New directory in tools called tools/tracing, where a new tool that reads
sequential latency reports from the ftrace latency tracers.
- Other minor fixes and cleanups.
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Merge tag 'trace-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
- Update to the way irqs and preemption is tracked via the trace event
PC field
- Fix handling of unregistering event failing due to allocate memory.
This is only triggered by failure injection, as it is pretty much
guaranteed to have less than a page allocation succeed.
- Do not show the useless "filter" or "enable" files for the "ftrace"
trace system, as they have no effect on doing anything.
- Add a warning if kprobes are registered more than once.
- Synthetic events now have their fields parsed by semicolons. Old
formats without semicolons will still work, but new features will
require them.
- New option to allow trace events to show %p without hashing in trace
file. The trace file can only be read by root, and reading the raw
event buffer did not have any pointers hashed, so this does not
expose anything new.
- New directory in tools called tools/tracing, where a new tool that
reads sequential latency reports from the ftrace latency tracers.
- Other minor fixes and cleanups.
* tag 'trace-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (33 commits)
kprobes: Fix to delay the kprobes jump optimization
tracing/tools: Add the latency-collector to tools directory
tracing: Make hash-ptr option default
tracing: Add ptr-hash option to show the hashed pointer value
tracing: Update the stage 3 of trace event macro comment
tracing: Show real address for trace event arguments
selftests/ftrace: Add '!event' synthetic event syntax check
selftests/ftrace: Update synthetic event syntax errors
tracing: Add a backward-compatibility check for synthetic event creation
tracing: Update synth command errors
tracing: Rework synthetic event command parsing
tracing/dynevent: Delegate parsing to create function
kprobes: Warn if the kprobe is reregistered
ftrace: Remove unused ftrace_force_update()
tracepoints: Code clean up
tracepoints: Do not punish non static call users
tracepoints: Remove unnecessary "data_args" macro parameter
tracing: Do not create "enable" or "filter" files for ftrace event subsystem
kernel: trace: preemptirq_delay_test: add cpu affinity
tracepoint: Do not fail unregistering a probe due to memory failure
...
|
||
|
Christoph Hellwig
|
16fc3cef33 |
swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single
swiotlb_tbl_map_single currently nevers sets a tlb_addr that is not aligned to the tlb bucket size. But we're going to add such a case soon, for which this adjustment would be bogus. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jianxiong Gao <jxgao@google.com> Tested-by: Jianxiong Gao <jxgao@google.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
||
|
Christoph Hellwig
|
26a7e09478 |
swiotlb: refactor swiotlb_tbl_map_single
Split out a bunch of a self-contained helpers to make the function easier to follow. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jianxiong Gao <jxgao@google.com> Tested-by: Jianxiong Gao <jxgao@google.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
||
|
Linus Torvalds
|
899cbb0e53 |
kgdb patches for 5.12
Another fairly small set of changes of changes this cycle. The most significant functional change is a fix to better manage the flags when allocating memory. Additionally there is the removal of some unused code (which is slightly more dramatic than it sounds given it means there are now no tasklets in kgdb) together with a tidy up of the debug prints and some spelling corrections for the documentation. Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEELzVBU1D3lWq6cKzwfOMlXTn3iKEFAmAz6HIACgkQfOMlXTn3 iKFUoRAAqFOqqeMltvNxS/UFCl9N8THyc1jtLZp3eszQGfZ0+bFRqO7ucXBmA+vL V2YyWU6f4p63NnEY/lj5f0xhK59Xc3qYGh3f/cbwZO90Ul8qHCh2UU93LkSWx7Xl 1NqV7CrLZudRpDFx5cGl+PLeK6N0y8jpu+/O/o+mfJHUw4l9ElfpqPytyiXfgGA/ 6t6U9jU95oHH196/Y5fzW9GyO4xJ1ZQMIaEpd2JdM+F4mBG3cMDMTRPyGNLk8Yvd AfKUVCFQcnL/BJTwGNiovlv5APN1cksk9MECkSE2yFE4I1y5L4/GxtazG0MktVVZ oVW+CWJdnnmx7M1PddE3womgaG5lL0IZW8h0QE34EDcLtjJrfkaG2kzTmmrvBazA 8MIHSNbA1oWxv30GmAQ0vQa5ddBEyqrnaYr/ArYDETUV+HPM7V79c1wvUSmPEEwC PDsx4bfVqzWXGADMFbtRdMzKeK93KdFKY5CaGBVgtnU38wZkd8yXGPMB7468utn0 RmdBqYMbzfAFQvcJig0eGJtS8wvXFWS4rxQqUIOwH9SKrWwGjv5S/AMe/rjyTnrp 8Nv8wbi/N0C/gX7an6o5R8lxMfdgz9TQN3BrB2osINltadbrhRuVcFIyRbyIOBki m6P18RQX7lN9d0sS0E0Pz2WCQk3axXBjAuxRANbbnPllo1Ds49w= =fQWC -----END PGP SIGNATURE----- Merge tag 'kgdb-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux Pull kgdb updates from Daniel Thompson: "Another fairly small set of changes of changes this cycle. The most significant functional change is a fix to better manage the flags when allocating memory. Additionally there is the removal of some unused code (which is slightly more dramatic than it sounds given it means there are now no tasklets in kgdb) together with a tidy up of the debug prints and some spelling corrections for the documentation" * tag 'kgdb-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux: kgdb: Remove kgdb_schedule_breakpoint() kdb: Make memory allocations more robust kdb: kdb_support: Fix debugging information problem kernel: debug: fix typo issue kgdb: rectify kernel-doc for kgdb_unregister_io_module() |
||
|
Linus Torvalds
|
b2bec7d8a4 |
printk changes for 5.12
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||
Cong Wang
|
53f523f305 |
bpf: Clear percpu pointers in bpf_prog_clone_free()
Similar to bpf_prog_realloc(), bpf_prog_clone_create() also copies the percpu pointers, but the clone still shares them with the original prog, so we have to clear these two percpu pointers in bpf_prog_clone_free(). Otherwise we would get a double free: BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 13 PID: 8140 Comm: kworker/13:247 Kdump: loaded Tainted: G W OE 5.11.0-rc4.bm.1-amd64+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 test_bpf: #1 TXA Workqueue: events bpf_prog_free_deferred RIP: 0010:percpu_ref_get_many.constprop.97+0x42/0xf0 Code: [...] RSP: 0018:ffffa6bce1f9bda0 EFLAGS: 00010002 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00000000021dfc7b RDX: ffffffffae2eeb90 RSI: 867f92637e338da5 RDI: 0000000000000046 RBP: ffffa6bce1f9bda8 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000046 R11: 0000000000000000 R12: 0000000000000280 R13: 0000000000000000 R14: 0000000000000000 R15: ffff9b5f3ffdedc0 FS: 0000000000000000(0000) GS:ffff9b5f2fb40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000027c36c002 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: refill_obj_stock+0x5e/0xd0 free_percpu+0xee/0x550 __bpf_prog_free+0x4d/0x60 process_one_work+0x26a/0x590 worker_thread+0x3c/0x390 ? process_one_work+0x590/0x590 kthread+0x130/0x150 ? kthread_park+0x80/0x80 ret_from_fork+0x1f/0x30 This bug is 100% reproducible with test_kmod.sh. Fixes: |
||
Dan Carpenter
|
33ccec5fd7 |
bpf: Fix a warning message in mark_ptr_not_null_reg()
The WARN_ON() argument is a condition, not an error message. So this
code will print a stack trace but will not print the warning message.
Fix that and also change it to only WARN_ONCE().
Fixes:
|
||
|
Chaitanya Kulkarni
|
1f83bb4b49 |
blktrace: add blk_fill_rwbs documentation comment
blk_fill_rwbs() is an expoted function, add kernel style documentation comment. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
|
Chaitanya Kulkarni
|
179d160072 |
block: remove superfluous param in blk_fill_rwbs()
The last parameter for the function blk_fill_rwbs() was added in
5782138e47 ("tracing/events: convert block trace points to
TRACE_EVENT()") in order to signal read request and use of that parameter
was replaced with using switch case REQ_OP_READ with
|
||
Petr Mladek
|
16182ac1f0 | Merge branch 'printk-rework' into for-linus | ||
Pavel Tatashin
|
2596b6ae41 |
kexec: move machine_kexec_post_load() to public interface
The kernel test robot reports the following compiler warning:
| arch/arm64/kernel/machine_kexec.c:62:5: warning: no previous prototype for
| function 'machine_kexec_post_load' [-Wmissing-prototypes]
| int machine_kexec_post_load(struct kimage *kimage)
Fix it by moving the declaration of machine_kexec_post_load() from
kexec_internal.h to the public header instead.
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/linux-arm-kernel/202102030727.gqTokACH-lkp@intel.com
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Link: https://lore.kernel.org/r/20210219195142.13571-1-pasha.tatashin@soleen.com
Fixes:
|
||
|
Linus Torvalds
|
177626c6d5 |
seccomp updates for v5.12-rc1
- Fix a non-FILTER build failure for some architectures (Paul Cercueil)
- Improve performance with correct memory barrier (wanghongzhe)
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Merge tag 'seccomp-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull seccomp updates from Kees Cook:
"Two small seccomp updates.
This contains a fix for a build failure that went unnoticed for many
years, and a memory barrier correction:
- Fix a non-FILTER build failure for some architectures (Paul
Cercueil)
- Improve performance with correct memory barrier (wanghongzhe)"
* tag 'seccomp-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
seccomp: Improve performace by optimizing rmb()
seccomp: Add missing return in non-void function
|
||
|
Linus Torvalds
|
d643a99089 |
integrity-v5.12
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||
|
Linus Torvalds
|
23b6ba45f3 |
audit/stable-5.12 PR 20210215
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||
Jens Axboe
|
6fb8f43ced |
kernel: treat PF_IO_WORKER like PF_KTHREAD for ptrace/signals
Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
|
Linus Torvalds
|
3e10585335 |
x86:
- Support for userspace to emulate Xen hypercalls
- Raise the maximum number of user memslots
- Scalability improvements for the new MMU. Instead of the complex
"fast page fault" logic that is used in mmu.c, tdp_mmu.c uses an
rwlock so that page faults are concurrent, but the code that can run
against page faults is limited. Right now only page faults take the
lock for reading; in the future this will be extended to some
cases of page table destruction. I hope to switch the default MMU
around 5.12-rc3 (some testing was delayed due to Chinese New Year).
- Cleanups for MAXPHYADDR checks
- Use static calls for vendor-specific callbacks
- On AMD, use VMLOAD/VMSAVE to save and restore host state
- Stop using deprecated jump label APIs
- Workaround for AMD erratum that made nested virtualization unreliable
- Support for LBR emulation in the guest
- Support for communicating bus lock vmexits to userspace
- Add support for SEV attestation command
- Miscellaneous cleanups
PPC:
- Support for second data watchpoint on POWER10
- Remove some complex workarounds for buggy early versions of POWER9
- Guest entry/exit fixes
ARM64
- Make the nVHE EL2 object relocatable
- Cleanups for concurrent translation faults hitting the same page
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Simplification of the early init hypercall handling
Non-KVM changes (with acks):
- Detection of contended rwlocks (implemented only for qrwlocks,
because KVM only needs it for x86)
- Allow __DISABLE_EXPORTS from assembly code
- Provide a saner follow_pfn replacements for modules
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"x86:
- Support for userspace to emulate Xen hypercalls
- Raise the maximum number of user memslots
- Scalability improvements for the new MMU.
Instead of the complex "fast page fault" logic that is used in
mmu.c, tdp_mmu.c uses an rwlock so that page faults are concurrent,
but the code that can run against page faults is limited. Right now
only page faults take the lock for reading; in the future this will
be extended to some cases of page table destruction. I hope to
switch the default MMU around 5.12-rc3 (some testing was delayed
due to Chinese New Year).
- Cleanups for MAXPHYADDR checks
- Use static calls for vendor-specific callbacks
- On AMD, use VMLOAD/VMSAVE to save and restore host state
- Stop using deprecated jump label APIs
- Workaround for AMD erratum that made nested virtualization
unreliable
- Support for LBR emulation in the guest
- Support for communicating bus lock vmexits to userspace
- Add support for SEV attestation command
- Miscellaneous cleanups
PPC:
- Support for second data watchpoint on POWER10
- Remove some complex workarounds for buggy early versions of POWER9
- Guest entry/exit fixes
ARM64:
- Make the nVHE EL2 object relocatable
- Cleanups for concurrent translation faults hitting the same page
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Simplification of the early init hypercall handling
Non-KVM changes (with acks):
- Detection of contended rwlocks (implemented only for qrwlocks,
because KVM only needs it for x86)
- Allow __DISABLE_EXPORTS from assembly code
- Provide a saner follow_pfn replacements for modules"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (192 commits)
KVM: x86/xen: Explicitly pad struct compat_vcpu_info to 64 bytes
KVM: selftests: Don't bother mapping GVA for Xen shinfo test
KVM: selftests: Fix hex vs. decimal snafu in Xen test
KVM: selftests: Fix size of memslots created by Xen tests
KVM: selftests: Ignore recently added Xen tests' build output
KVM: selftests: Add missing header file needed by xAPIC IPI tests
KVM: selftests: Add operand to vmsave/vmload/vmrun in svm.c
KVM: SVM: Make symbol 'svm_gp_erratum_intercept' static
locking/arch: Move qrwlock.h include after qspinlock.h
KVM: PPC: Book3S HV: Fix host radix SLB optimisation with hash guests
KVM: PPC: Book3S HV: Ensure radix guest has no SLB entries
KVM: PPC: Don't always report hash MMU capability for P9 < DD2.2
KVM: PPC: Book3S HV: Save and restore FSCR in the P9 path
KVM: PPC: remove unneeded semicolon
KVM: PPC: Book3S HV: Use POWER9 SLBIA IH=6 variant to clear SLB
KVM: PPC: Book3S HV: No need to clear radix host SLB before loading HPT guest
KVM: PPC: Book3S HV: Fix radix guest SLB side channel
KVM: PPC: Book3S HV: Remove support for running HPT guest on RPT host without mixed mode support
KVM: PPC: Book3S HV: Introduce new capability for 2nd DAWR
KVM: PPC: Book3S HV: Add infrastructure to support 2nd DAWR
...
|
||
|
Linus Torvalds
|
2671fe5e1d |
- added support for Nintendo N64
- added support for Realtek RTL83XX SoCs
- kaslr support for Loongson64
- first steps to get rid of set_fs()
- DMA runtime coherent/non-coherent selection cleanup
- cleanups and fixes
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Merge tag 'mips_5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Pull MIPS updates from Thomas Bogendoerfer:
- added support for Nintendo N64
- added support for Realtek RTL83XX SoCs
- kaslr support for Loongson64
- first steps to get rid of set_fs()
- DMA runtime coherent/non-coherent selection cleanup
- cleanups and fixes
* tag 'mips_5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (98 commits)
Revert "MIPS: Add basic support for ptrace single step"
vmlinux.lds.h: catch more UBSAN symbols into .data
MIPS: kernel: Drop kgdb_call_nmi_hook
MAINTAINERS: Add git tree for KVM/mips
MIPS: Use common way to parse elfcorehdr
MIPS: Simplify EVA cache handling
Revert "MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes"
MIPS: remove CONFIG_DMA_PERDEV_COHERENT
MIPS: remove CONFIG_DMA_MAYBE_COHERENT
driver core: lift dma_default_coherent into common code
MIPS: refactor the runtime coherent vs noncoherent DMA indicators
MIPS/alchemy: factor out the DMA coherent setup
MIPS/malta: simplify plat_setup_iocoherency
MIPS: Add basic support for ptrace single step
MAINTAINERS: replace non-matching patterns for loongson{2,3}
MIPS: Make check condition for SDBBP consistent with EJTAG spec
mips: Replace lkml.org links with lore
Revert "MIPS: microMIPS: Fix the judgment of mm_jr16_op and mm_jalr_op"
MIPS: crash_dump.c: Simplify copy_oldmem_page()
Revert "mips: Manually call fdt_init_reserved_mem() method"
...
|
||
|
Linus Torvalds
|
d310ec03a3 |
The performance event updates for v5.12 are:
- Add CPU-PMU support for Intel Sapphire Rapids CPUs
- Extend the perf ABI with PERF_SAMPLE_WEIGHT_STRUCT, to offer two-parameter
sampling event feedback. Not used yet, but is intended for Golden Cove
CPU-PMU, which can provide both the instruction latency and the cache
latency information for memory profiling events.
- Remove experimental, default-disabled perfmon-v4 counter_freezing support
that could only be enabled via a boot option. The hardware is hopelessly
broken, we'd like to make sure nobody starts relying on this, as it would
only end in tears.
- Fix energy/power events on Intel SPR platforms
- Simplify the uprobes resume_execution() logic
- Misc smaller fixes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull performance event updates from Ingo Molnar:
- Add CPU-PMU support for Intel Sapphire Rapids CPUs
- Extend the perf ABI with PERF_SAMPLE_WEIGHT_STRUCT, to offer
two-parameter sampling event feedback. Not used yet, but is intended
for Golden Cove CPU-PMU, which can provide both the instruction
latency and the cache latency information for memory profiling
events.
- Remove experimental, default-disabled perfmon-v4 counter_freezing
support that could only be enabled via a boot option. The hardware is
hopelessly broken, we'd like to make sure nobody starts relying on
this, as it would only end in tears.
- Fix energy/power events on Intel SPR platforms
- Simplify the uprobes resume_execution() logic
- Misc smaller fixes.
* tag 'perf-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/rapl: Fix psys-energy event on Intel SPR platform
perf/x86/rapl: Only check lower 32bits for RAPL energy counters
perf/x86/rapl: Add msr mask support
perf/x86/kvm: Add Cascade Lake Xeon steppings to isolation_ucodes[]
perf/x86/intel: Support CPUID 10.ECX to disable fixed counters
perf/x86/intel: Add perf core PMU support for Sapphire Rapids
perf/x86/intel: Filter unsupported Topdown metrics event
perf/x86/intel: Factor out intel_update_topdown_event()
perf/core: Add PERF_SAMPLE_WEIGHT_STRUCT
perf/intel: Remove Perfmon-v4 counter_freezing support
x86/perf: Use static_call for x86_pmu.guest_get_msrs
perf/x86/intel/uncore: With > 8 nodes, get pci bus die id from NUMA info
perf/x86/intel/uncore: Store the logical die id instead of the physical die id.
x86/kprobes: Do not decode opcode in resume_execution()
|
||
|
Linus Torvalds
|
657bd90c93 |
Scheduler updates for v5.12:
[ NOTE: unfortunately this tree had to be freshly rebased today,
it's a same-content tree of 82891be90f3c (-next published)
merged with v5.11.
The main reason for the rebase was an authorship misattribution
problem with a new commit, which we noticed in the last minute,
and which we didn't want to be merged upstream. The offending
commit was deep in the tree, and dependent commits had to be
rebased as well. ]
- Core scheduler updates:
- Add CONFIG_PREEMPT_DYNAMIC: this in its current form adds the
preempt=none/voluntary/full boot options (default: full),
to allow distros to build a PREEMPT kernel but fall back to
close to PREEMPT_VOLUNTARY (or PREEMPT_NONE) runtime scheduling
behavior via a boot time selection.
There's also the /debug/sched_debug switch to do this runtime.
This feature is implemented via runtime patching (a new variant of static calls).
The scope of the runtime patching can be best reviewed by looking
at the sched_dynamic_update() function in kernel/sched/core.c.
( Note that the dynamic none/voluntary mode isn't 100% identical,
for example preempt-RCU is available in all cases, plus the
preempt count is maintained in all models, which has runtime
overhead even with the code patching. )
The PREEMPT_VOLUNTARY/PREEMPT_NONE models, used by the vast majority
of distributions, are supposed to be unaffected.
- Fix ignored rescheduling after rcu_eqs_enter(). This is a bug that
was found via rcutorture triggering a hang. The bug is that
rcu_idle_enter() may wake up a NOCB kthread, but this happens after
the last generic need_resched() check. Some cpuidle drivers fix it
by chance but many others don't.
In true 2020 fashion the original bug fix has grown into a 5-patch
scheduler/RCU fix series plus another 16 RCU patches to address
the underlying issue of missed preemption events. These are the
initial fixes that should fix current incarnations of the bug.
- Clean up rbtree usage in the scheduler, by providing & using the following
consistent set of rbtree APIs:
partial-order; less() based:
- rb_add(): add a new entry to the rbtree
- rb_add_cached(): like rb_add(), but for a rb_root_cached
total-order; cmp() based:
- rb_find(): find an entry in an rbtree
- rb_find_add(): find an entry, and add if not found
- rb_find_first(): find the first (leftmost) matching entry
- rb_next_match(): continue from rb_find_first()
- rb_for_each(): iterate a sub-tree using the previous two
- Improve the SMP/NUMA load-balancer: scan for an idle sibling in a single pass.
This is a 4-commit series where each commit improves one aspect of the idle
sibling scan logic.
- Improve the cpufreq cooling driver by getting the effective CPU utilization
metrics from the scheduler
- Improve the fair scheduler's active load-balancing logic by reducing the number
of active LB attempts & lengthen the load-balancing interval. This improves
stress-ng mmapfork performance.
- Fix CFS's estimated utilization (util_est) calculation bug that can result in
too high utilization values
- Misc updates & fixes:
- Fix the HRTICK reprogramming & optimization feature
- Fix SCHED_SOFTIRQ raising race & warning in the CPU offlining code
- Reduce dl_add_task_root_domain() overhead
- Fix uprobes refcount bug
- Process pending softirqs in flush_smp_call_function_from_idle()
- Clean up task priority related defines, remove *USER_*PRIO and
USER_PRIO()
- Simplify the sched_init_numa() deduplication sort
- Documentation updates
- Fix EAS bug in update_misfit_status(), which degraded the quality
of energy-balancing
- Smaller cleanups
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"Core scheduler updates:
- Add CONFIG_PREEMPT_DYNAMIC: this in its current form adds the
preempt=none/voluntary/full boot options (default: full), to allow
distros to build a PREEMPT kernel but fall back to close to
PREEMPT_VOLUNTARY (or PREEMPT_NONE) runtime scheduling behavior via
a boot time selection.
There's also the /debug/sched_debug switch to do this runtime.
This feature is implemented via runtime patching (a new variant of
static calls).
The scope of the runtime patching can be best reviewed by looking
at the sched_dynamic_update() function in kernel/sched/core.c.
( Note that the dynamic none/voluntary mode isn't 100% identical,
for example preempt-RCU is available in all cases, plus the
preempt count is maintained in all models, which has runtime
overhead even with the code patching. )
The PREEMPT_VOLUNTARY/PREEMPT_NONE models, used by the vast
majority of distributions, are supposed to be unaffected.
- Fix ignored rescheduling after rcu_eqs_enter(). This is a bug that
was found via rcutorture triggering a hang. The bug is that
rcu_idle_enter() may wake up a NOCB kthread, but this happens after
the last generic need_resched() check. Some cpuidle drivers fix it
by chance but many others don't.
In true 2020 fashion the original bug fix has grown into a 5-patch
scheduler/RCU fix series plus another 16 RCU patches to address the
underlying issue of missed preemption events. These are the initial
fixes that should fix current incarnations of the bug.
- Clean up rbtree usage in the scheduler, by providing & using the
following consistent set of rbtree APIs:
partial-order; less() based:
- rb_add(): add a new entry to the rbtree
- rb_add_cached(): like rb_add(), but for a rb_root_cached
total-order; cmp() based:
- rb_find(): find an entry in an rbtree
- rb_find_add(): find an entry, and add if not found
- rb_find_first(): find the first (leftmost) matching entry
- rb_next_match(): continue from rb_find_first()
- rb_for_each(): iterate a sub-tree using the previous two
- Improve the SMP/NUMA load-balancer: scan for an idle sibling in a
single pass. This is a 4-commit series where each commit improves
one aspect of the idle sibling scan logic.
- Improve the cpufreq cooling driver by getting the effective CPU
utilization metrics from the scheduler
- Improve the fair scheduler's active load-balancing logic by
reducing the number of active LB attempts & lengthen the
load-balancing interval. This improves stress-ng mmapfork
performance.
- Fix CFS's estimated utilization (util_est) calculation bug that can
result in too high utilization values
Misc updates & fixes:
- Fix the HRTICK reprogramming & optimization feature
- Fix SCHED_SOFTIRQ raising race & warning in the CPU offlining code
- Reduce dl_add_task_root_domain() overhead
- Fix uprobes refcount bug
- Process pending softirqs in flush_smp_call_function_from_idle()
- Clean up task priority related defines, remove *USER_*PRIO and
USER_PRIO()
- Simplify the sched_init_numa() deduplication sort
- Documentation updates
- Fix EAS bug in update_misfit_status(), which degraded the quality
of energy-balancing
- Smaller cleanups"
* tag 'sched-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits)
sched,x86: Allow !PREEMPT_DYNAMIC
entry/kvm: Explicitly flush pending rcuog wakeup before last rescheduling point
entry: Explicitly flush pending rcuog wakeup before last rescheduling point
rcu/nocb: Trigger self-IPI on late deferred wake up before user resume
rcu/nocb: Perform deferred wake up before last idle's need_resched() check
rcu: Pull deferred rcuog wake up to rcu_eqs_enter() callers
sched/features: Distinguish between NORMAL and DEADLINE hrtick
sched/features: Fix hrtick reprogramming
sched/deadline: Reduce rq lock contention in dl_add_task_root_domain()
uprobes: (Re)add missing get_uprobe() in __find_uprobe()
smp: Process pending softirqs in flush_smp_call_function_from_idle()
sched: Harden PREEMPT_DYNAMIC
static_call: Allow module use without exposing static_call_key
sched: Add /debug/sched_preempt
preempt/dynamic: Support dynamic preempt with preempt= boot option
preempt/dynamic: Provide irqentry_exit_cond_resched() static call
preempt/dynamic: Provide preempt_schedule[_notrace]() static calls
preempt/dynamic: Provide cond_resched() and might_resched() static calls
preempt: Introduce CONFIG_PREEMPT_DYNAMIC
static_call: Provide DEFINE_STATIC_CALL_RET0()
...
|
||
|
Linus Torvalds
|
9eef023345 |
These are the v5.12 updates for the locking subsystem:
- Core locking primitives updates:
- Remove mutex_trylock_recursive() from the API - no users left
- Simplify + constify the futex code a bit
- Lockdep updates:
- Teach lockdep about local_lock_t
- Add CONFIG_DEBUG_IRQFLAGS=y debug config option to check for
potentially unsafe IRQ mask restoration patterns. (I.e.
calling raw_local_irq_restore() with IRQs enabled.)
- Add wait context self-tests
- Fix graph lock corner case corrupting internal data structures
- Fix noinstr annotations
- LKMM updates:
- Simplify the litmus tests
- Documentation fixes
- KCSAN updates:
- Re-enable KCSAN instrumentation in lib/random32.c
- Misc fixes:
- Don't branch-trace static label APIs
- DocBook fix
- Remove stale leftover empty file
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"Core locking primitives updates:
- Remove mutex_trylock_recursive() from the API - no users left
- Simplify + constify the futex code a bit
Lockdep updates:
- Teach lockdep about local_lock_t
- Add CONFIG_DEBUG_IRQFLAGS=y debug config option to check for
potentially unsafe IRQ mask restoration patterns. (I.e.
calling raw_local_irq_restore() with IRQs enabled.)
- Add wait context self-tests
- Fix graph lock corner case corrupting internal data structures
- Fix noinstr annotations
LKMM updates:
- Simplify the litmus tests
- Documentation fixes
KCSAN updates:
- Re-enable KCSAN instrumentation in lib/random32.c
Misc fixes:
- Don't branch-trace static label APIs
- DocBook fix
- Remove stale leftover empty file"
* tag 'locking-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
checkpatch: Don't check for mutex_trylock_recursive()
locking/mutex: Kill mutex_trylock_recursive()
s390: Use arch_local_irq_{save,restore}() in early boot code
lockdep: Noinstr annotate warn_bogus_irq_restore()
locking/lockdep: Avoid unmatched unlock
locking/rwsem: Remove empty rwsem.h
locking/rtmutex: Add missing kernel-doc markup
futex: Remove unneeded gotos
futex: Change utime parameter to be 'const ... *'
lockdep: report broken irq restoration
jump_label: Do not profile branch annotations
locking: Add Reviewers
locking/selftests: Add local_lock inversion tests
locking/lockdep: Exclude local_lock_t from IRQ inversions
locking/lockdep: Clean up check_redundant() a bit
locking/lockdep: Add a skip() function to __bfs()
locking/lockdep: Mark local_lock_t
locking/selftests: More granular debug_locks_verbose
lockdep/selftest: Add wait context selftests
tools/memory-model: Fix typo in klitmus7 compatibility table
...
|
||
|
Linus Torvalds
|
d089f48fba |
These are the latest RCU updates for v5.12:
- Documentation updates.
- Miscellaneous fixes.
- kfree_rcu() updates: Addition of mem_dump_obj() to provide allocator return
addresses to more easily locate bugs. This has a couple of RCU-related commits,
but is mostly MM. Was pulled in with akpm's agreement.
- Per-callback-batch tracking of numbers of callbacks,
which enables better debugging information and smarter
reactions to large numbers of callbacks.
- The first round of changes to allow CPUs to be runtime switched from and to
callback-offloaded state.
- CONFIG_PREEMPT_RT-related changes.
- RCU CPU stall warning updates.
- Addition of polling grace-period APIs for SRCU.
- Torture-test and torture-test scripting updates, including a "torture everything"
script that runs rcutorture, locktorture, scftorture, rcuscale, and refscale.
Plus does an allmodconfig build.
- nolibc fixes for the torture tests
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'core-rcu-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
"These are the latest RCU updates for v5.12:
- Documentation updates.
- Miscellaneous fixes.
- kfree_rcu() updates: Addition of mem_dump_obj() to provide
allocator return addresses to more easily locate bugs. This has a
couple of RCU-related commits, but is mostly MM. Was pulled in with
akpm's agreement.
- Per-callback-batch tracking of numbers of callbacks, which enables
better debugging information and smarter reactions to large numbers
of callbacks.
- The first round of changes to allow CPUs to be runtime switched
from and to callback-offloaded state.
- CONFIG_PREEMPT_RT-related changes.
- RCU CPU stall warning updates.
- Addition of polling grace-period APIs for SRCU.
- Torture-test and torture-test scripting updates, including a
"torture everything" script that runs rcutorture, locktorture,
scftorture, rcuscale, and refscale. Plus does an allmodconfig
build.
- nolibc fixes for the torture tests"
* tag 'core-rcu-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (130 commits)
percpu_ref: Dump mem_dump_obj() info upon reference-count underflow
rcu: Make call_rcu() print mem_dump_obj() info for double-freed callback
mm: Make mem_obj_dump() vmalloc() dumps include start and length
mm: Make mem_dump_obj() handle vmalloc() memory
mm: Make mem_dump_obj() handle NULL and zero-sized pointers
mm: Add mem_dump_obj() to print source of memory block
tools/rcutorture: Fix position of -lgcc in mkinitrd.sh
tools/nolibc: Fix position of -lgcc in the documented example
tools/nolibc: Emit detailed error for missing alternate syscall number definitions
tools/nolibc: Remove incorrect definitions of __ARCH_WANT_*
tools/nolibc: Get timeval, timespec and timezone from linux/time.h
tools/nolibc: Implement poll() based on ppoll()
tools/nolibc: Implement fork() based on clone()
tools/nolibc: Make getpgrp() fall back to getpgid(0)
tools/nolibc: Make dup2() rely on dup3() when available
tools/nolibc: Add the definition for dup()
rcutorture: Add rcutree.use_softirq=0 to RUDE01 and TASKS01
torture: Maintain torture-specific set of CPUs-online books
torture: Clean up after torture-test CPU hotplugging
rcutorture: Make object_debug also double call_rcu() heap object
...
|
||
|
Linus Torvalds
|
3f6ec19f2d |
Time and timer updates:
- Instead of new drivers remove tango, sirf, u300 and atlas drivers - Add suspend/resume support for microchip pit64b - The usual fixes, improvements and cleanups here and there -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmAqjecTHHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYodVTD/9UuKlOifRBNd4ECR+yF65MzLfjqNHU j76E3Dzuf4QCbXTjmQAsadaqQ+w9l8Ie7OVT51XlmTczEBkJiV3FOGLVJeRun6R4 7OLF3VOYyBUtMoRdHzyXaYOTbsOK9gZitucDeLCQhvKhDCkVnKKFXNJR+TTkSYM3 xDBLwuI7uuHWHyh0+W+3SI1pTiEA4yMe5ZbqqoJbjGQapr3Eao+nyjd1aa3ERb2f PtS7UVQ69QowRqq6DQyZk0yKit8J3HZnHfCPH/T6eXsxGnui36GiUnTGCMhLMZpD Xvl/5cjqQuKjgt2093t8nGiumOGBOfrb8uvc/qMW777DzFe/VJtXrC/7pySVLAhK oc9Swj0iX/WPARzlpyOk3lfpDMzv6qyjMNJIXcnav2lrknITp+TMORKWOADB03UV sswlN7YFTrNe7d7uxEdybKkNX6bUwgOzo2m69A1IdSXwKPzYkZQmku6Y7GnzYErZ aiJiZl858VB9g24ROKLt/uQTarzYCS0sjcdnDgO1KSR7zKHZ4iUpd3zucd3mlmUo fGTMIbCqL/gzl4Zcl6njvzMVfJeMzOeDiQ41wCyYnOsXlIKmWNi1rONdGZcyDYvN bOiGVUMKicEZwBlSZQQ1GdR9eGf8/Ix5cTlynZepN3dkHUDc7SU+OvQZdg4Yd/RY BsquFDHnt4gl+A== =xZQt -----END PGP SIGNATURE----- Merge tag 'timers-core-2021-02-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: "Time and timer updates: - Instead of new drivers remove tango, sirf, u300 and atlas drivers - Add suspend/resume support for microchip pit64b - The usual fixes, improvements and cleanups here and there" * tag 'timers-core-2021-02-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: timens: Delete no-op time_ns_init() alarmtimer: Update kerneldoc clocksource/drivers/timer-microchip-pit64b: Add clocksource suspend/resume clocksource/drivers/prima: Remove sirf prima driver clocksource/drivers/atlas: Remove sirf atlas driver clocksource/drivers/tango: Remove tango driver clocksource/drivers/u300: Remove the u300 driver dt-bindings: timer: nuvoton: Clarify that interrupt of timer 0 should be specified clocksource/drivers/davinci: Move pr_fmt() before the includes clocksource/drivers/efm32: Drop unused timer code |
||
|
Linus Torvalds
|
b5183bc94b |
Updates for the irq subsystem:
- The usual new irq chip driver (Realtek RTL83xx) - Removal of sirfsoc and tango irq chip drivers - Conversion of the sun6i chip support to hierarchical irq domains - The usual fixes, improvements and cleanups all over the place -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmAqjRITHHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYob0ND/9ghLC0XF7gSrIFBxNXczQcckd0Ev8y gt7EJMxy9+UG/krEmLk4p5FkkKaUQy4v8PMqhDpI0pR7Fdm2oaOCgPRHsNdVYr5J g7FawE99qPiRXaR29rpfX6qIBRP3rJ4/MS90YlcXGvKbgPtqCXStEWrIyu1/1Q8A 3BdfKL3K15/TeWeu9075yHX8V4Ovss6Birc0/XNtQWiHNk84GAZVIQPjfdHEu83j Kv4QxlrfSDjCvB016YKL04kjrwzUXxksvGnyjFXNXFZwg0bVtLTujSdkXajUBQjv 1ZpcEM+gBPdeOU99ELYeaQ9B0Di2mNjya5TBttmKdKW/nQ01BkWUouoqyBRqjpvd +2uXaad/D7iKUYXqXtSim8OpwBLb5THQdG4qn1vgYZOUxWu9DKdtZEO3hw8edgjN zJEQFI8yBeDtcAjKTqm0C2fomlWPhDM0A97EHmV8LiQpz0PyY9q8Oogg51t1RggH 7w9+YjjrGkaPifZXX+YogJT/CbFanK6lOUIFg/qro1QcicCsEbWrTaHUOwdpWpHr B4FKZIfrlnrY7yMC7aClPQSJr3iUXBUjfWhRKvYiwOLTabfUWz+HRFA++R8vytbL RvEZnhuvi3eyRn91yiapQM/f69yC1yslTZHy4/Ww9kvtOoawQpmegnZ3dLMhwBN1 aFgQi4U9Z7G2eA== =rM8s -----END PGP SIGNATURE----- Merge tag 'irq-core-2021-02-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: "Updates for the irq subsystem: - The usual new irq chip driver (Realtek RTL83xx) - Removal of sirfsoc and tango irq chip drivers - Conversion of the sun6i chip support to hierarchical irq domains - The usual fixes, improvements and cleanups all over the place" * tag 'irq-core-2021-02-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/imx: IMX_INTMUX should not default to y, unconditionally irqchip/loongson-pch-msi: Use bitmap_zalloc() to allocate bitmap irqchip/csky-mpintc: Prevent selection on unsupported platforms irqchip: Add support for Realtek RTL838x/RTL839x interrupt controller dt-bindings: interrupt-controller: Add Realtek RTL838x/RTL839x support irqchip/ls-extirq: add IRQCHIP_SKIP_SET_WAKE to the irqchip flags genirq: Use new tasklet API for resend_tasklet dt-bindings: qcom,pdc: Add compatible for SM8350 dt-bindings: qcom,pdc: Add compatible for SM8250 irqchip/sun6i-r: Add wakeup support irqchip/sun6i-r: Use a stacked irqchip driver dt-bindings: irq: sun6i-r: Add a compatible for the H3 dt-bindings: irq: sun6i-r: Split the binding from sun7i-nmi irqchip/gic-v3: Fix typos in PMR/RPR SCR_EL3.FIQ handling explanation irqchip: Remove sirfsoc driver irqchip: Remove sigma tango driver |
||
|
Linus Torvalds
|
582cd91f69 |
for-5.12/block-2021-02-17
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmAtmIwQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgplzLEAC5O+3rBM8QuiJdo39Yppmuw4hDJ6hOKynP EJQLKQQi0VfXgU+MprGvcbpFYmNbgICvUICQkEzJuk++kPCu/BJtJz0yErQeLgS+ RdXiPV6enbF7iRML5TVRTr1q/z7sJMXcIIJ8Pz/rU/JNfGYExVd0WfnEY9mp1jOt Bl9V+qyTazdP+Ma4+uEPatSayqcdi1rxB5I+7v/sLiOvKZZWkaRZjUZ/mxAjUfvK dBOOPjMygEo3tCLkIyyA6lpLvr1r+SUZhLuebRLEKa3To3TW6RtoG0qwpKmI2iKw ylLeVLB60nM9RUxjflVOfBsHxz1bDg5Ve86y5nCjQd4Jo8x1c4DnecyGE5/Tu8Rg rgbsfD6nFWzhDCvcZT0XrfQ4ZAjIL2IfT+ypQiQ6UlRd3hvIKRmzWMkjuH2svr0u ey9Kq+lYerI4cM0F3W73gzUKdIQOuCzBCYxQuSQQomscBa7FCInyU192dAI9Aj6l Yd06mgKu6qCx6zLv6JfpBqaBHZMwyGE4dmZgPQFuuwO+b4N+Ck3Jm5fzEzw/xIxQ wdo/DlsAl60BXentB6FByGBJaCjVdSymRqN/xNCAbFKCjmr6TLBuXPfg1gYYO7xC VOcVjWe8iN3wWHZab3t2mxMKH9B9B/KKzIhu6TNHSmgtQ5paZPRCBx995pDyRw26 WC22RGC2MA== =os1E -----END PGP SIGNATURE----- Merge tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block Pull core block updates from Jens Axboe: "Another nice round of removing more code than what is added, mostly due to Christoph's relentless pursuit of tech debt removal/cleanups. This pull request contains: - Two series of BFQ improvements (Paolo, Jan, Jia) - Block iov_iter improvements (Pavel) - bsg error path fix (Pan) - blk-mq scheduler improvements (Jan) - -EBUSY discard fix (Jan) - bvec allocation improvements (Ming, Christoph) - bio allocation and init improvements (Christoph) - Store bdev pointer in bio instead of gendisk + partno (Christoph) - Block trace point cleanups (Christoph) - hard read-only vs read-only split (Christoph) - Block based swap cleanups (Christoph) - Zoned write granularity support (Damien) - Various fixes/tweaks (Chunguang, Guoqing, Lei, Lukas, Huhai)" * tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block: (104 commits) mm: simplify swapdev_block sd_zbc: clear zone resources for non-zoned case block: introduce blk_queue_clear_zone_settings() zonefs: use zone write granularity as block size block: introduce zone_write_granularity limit block: use blk_queue_set_zoned in add_partition() nullb: use blk_queue_set_zoned() to setup zoned devices nvme: cleanup zone information initialization block: document zone_append_max_bytes attribute block: use bi_max_vecs to find the bvec pool md/raid10: remove dead code in reshape_request block: mark the bio as cloned in bio_iov_bvec_set block: set BIO_NO_PAGE_REF in bio_iov_bvec_set block: remove a layer of indentation in bio_iov_iter_get_pages block: turn the nr_iovecs argument to bio_alloc* into an unsigned short block: remove the 1 and 4 vec bvec_slabs entries block: streamline bvec_alloc block: factor out a bvec_alloc_gfp helper block: move struct biovec_slab to bio.c block: reuse BIO_INLINE_VECS for integrity bvecs ... |
||
|
Linus Torvalds
|
24880bef41 |
Remove oprofile and dcookies support
The "oprofile" user-space tools don't use the kernel OPROFILE support any more, and haven't in a long time. User-space has been converted to the perf interfaces. The dcookies stuff is only used by the oprofile code. Now that oprofile's support is getting removed from the kernel, there is no need for dcookies as well. Remove kernel's old oprofile and dcookies support. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJgJMEVAAoJENK5HDyugRIcL8YP/jkmXH5CZT80ntcqrJGWKcG7 lWbach7uNeQteht7B1ZPKvojxizTkmfrN2sClX0B2hbGkc5TiWUQ2ZSnvnfWDZ8+ z2qQcEB11G/ReL2vvRk1fJlWdAOyUfrPee/44AkemnLRv+Niw/8PqnGd87yDQGsK qy5E1XXfbjUq6Y/uMiLOX3+21I6w6o2Q6I3NNXC93s0wS3awqnft8n0XBC7iAPBj eowRJxpdRU2Vcuj8UOzzOI7gQlwdjwYImyLPbRy/V8NawC8a+FHrPrf5/GCYlVzl 7TGFBsDQSmzvrBChUfoGz1Rq/VZ1a357p5rhRqemfUrdkjW+vyzelnD8I1W/hb2o SmBXoPoyl3+UkFHNyJI0mI7obaV+2PzyXMV0JIQUj+IiX/mfeFv0nF4XfZD2IkRt 6xhaYj775Zrx32iBdGZIvvLg5Gh9ZkZmR5vJ7Fi/EIZFe6Z+bZnPKUROnAgS/o0z +UkSygOhgo/1XbqrzZVk1iweWeu+EUMbY4YQv2qVnFhpvsq4ieThcUGQpWcxGjjH WP8O0n1yq1slsnpUtxhiTsm46ENajx9zZp6Iv6Ws+NM0RUqjND8BdF1co9WGD3LS cnZMFBs4Bg/V1HICL/D4s6L7t1ofrEXIgJH1y3iF0HeECq03mU4CgA/qly9Aebqg UxPF3oNlVOPlds9FzsU2 =I2Ac -----END PGP SIGNATURE----- Merge tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux Pull oprofile and dcookies removal from Viresh Kumar: "Remove oprofile and dcookies support The 'oprofile' user-space tools don't use the kernel OPROFILE support any more, and haven't in a long time. User-space has been converted to the perf interfaces. The dcookies stuff is only used by the oprofile code. Now that oprofile's support is getting removed from the kernel, there is no need for dcookies as well. Remove kernel's old oprofile and dcookies support" * tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux: fs: Remove dcookies support drivers: Remove CONFIG_OPROFILE support arch: xtensa: Remove CONFIG_OPROFILE support arch: x86: Remove CONFIG_OPROFILE support arch: sparc: Remove CONFIG_OPROFILE support arch: sh: Remove CONFIG_OPROFILE support arch: s390: Remove CONFIG_OPROFILE support arch: powerpc: Remove oprofile arch: powerpc: Stop building and using oprofile arch: parisc: Remove CONFIG_OPROFILE support arch: mips: Remove CONFIG_OPROFILE support arch: microblaze: Remove CONFIG_OPROFILE support arch: ia64: Remove rest of perfmon support arch: ia64: Remove CONFIG_OPROFILE support arch: hexagon: Don't select HAVE_OPROFILE arch: arc: Remove CONFIG_OPROFILE support arch: arm: Remove CONFIG_OPROFILE support arch: alpha: Remove CONFIG_OPROFILE support |
||
|
Linus Torvalds
|
591fd30eee |
Merge branch 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull ELF compat updates from Al Viro:
"Sanitizing ELF compat support, especially for triarch architectures:
- X32 handling cleaned up
- MIPS64 uses compat_binfmt_elf.c both for O32 and N32 now
- Kconfig side of things regularized
Eventually I hope to have compat_binfmt_elf.c killed, with both native
and compat built from fs/binfmt_elf.c, with -DELF_BITS={64,32} passed
by kbuild, but that's a separate story - not included here"
* 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
get rid of COMPAT_ELF_EXEC_PAGESIZE
compat_binfmt_elf: don't bother with undef of ELF_ARCH
Kconfig: regularize selection of CONFIG_BINFMT_ELF
mips compat: switch to compat_binfmt_elf.c
mips: don't bother with ELF_CORE_EFLAGS
mips compat: don't bother with ELF_ET_DYN_BASE
mips: KVM_GUEST makes no sense for 64bit builds...
mips: kill unused definitions in binfmt_elf[on]32.c
mips binfmt_elf*32.c: use elfcore-compat.h
x32: make X32, !IA32_EMULATION setups able to execute x32 binaries
[amd64] clean PRSTATUS_SIZE/SET_PR_FPVALID up properly
elf_prstatus: collect the common part (everything before pr_reg) into a struct
binfmt_elf: partially sanitize PRSTATUS_SIZE and SET_PR_FPVALID
|
||
|
Linus Torvalds
|
02f9fc286e |
Power management updates for 5.12-rc1
- Add new power capping facility called DTPM (Dynamic Thermal Power
Management), based on the existing power capping framework, to
allow aggregate power constraints to be applied to sets of devices
in a distributed manner, along with a CPU backend driver based on
the Energy Model (Daniel Lezcano, Dan Carpenter, Colin Ian King).
- Add AlderLake Mobile support to the Intel RAPL power capping
driver and make it use the topology interface when laying out the
system topology (Zhang Rui, Yunfeng Ye).
- Drop the cpufreq tango driver belonging to a platform that is not
supported any more (Arnd Bergmann).
- Drop the redundant CPUFREQ_STICKY and CPUFREQ_PM_NO_WARN cpufreq
driver flags (Viresh Kumar).
- Update cpufreq drivers:
* Fix max CPU frequency discovery in the intel_pstate driver and
make janitorial changes in it (Chen Yu, Rafael Wysocki, Nigel
Christian).
* Fix resource leaks in the brcmstb-avs-cpufreq driver (Christophe
JAILLET).
* Make the tegra20 driver use the resource-managed API (Dmitry
Osipenko).
* Enable boost support in the qcom-hw driver (Shawn Guo).
- Update the operating performance points (OPP) framework:
* Clean up the OPP core (Dmitry Osipenko, Viresh Kumar).
* Extend the OPP API by adding new helpers to it (Dmitry Osipenko,
Viresh Kumar).
* Allow required OPPs to be used for devfreq devices and update
the devfreq governor code accordingly (Saravana Kannan).
* Prepare the framework for introducing new dev_pm_opp_set_opp()
helper (Viresh Kumar).
* Drop dev_pm_opp_set_bw() and update related drivers (Viresh
Kumar).
* Allow lazy linking of required-OPPs (Viresh Kumar).
- Simplify and clean up devfreq somewhat (Lukasz Luba, Yang Li,
Pierre Kuo).
- Update the generic power domains (genpd) framework:
* Use device's next wakeup to determine domain idle state (Lina
Iyer).
* Improve initialization and debug (Dmitry Osipenko).
* Simplify computations (Abaci Team).
- Make janitorial changes in the core code handling system sleep
and PM-runtime (Bhaskar Chowdhury, Bjorn Helgaas, Rikard Falkeborn,
Zqiang).
- Update the MAINTAINERS entry for the exynos cpuidle driver and
drop DEBUG definition from intel_idle (Krzysztof Kozlowski, Tom
Rix).
- Extend the PM clock layer to cover clocks that must sleep (Nicolas
Pitre).
- Update the cpupower utility:
* Update cpupower command, add support for AMD family 0x19 and clean
up the code to remove many of the family checks to make future
family updates easier (Nathan Fontenot, Robert Richter).
* Add Makefile dependencies for install targets to allow building
cpupower in parallel rather than serially (Ivan Babrou).
- Make janitorial changes in power management Kconfig (Lukasz Luba).
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Merge tag 'pm-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"These add a new power capping facility allowing aggregate power
constraints to be applied to sets of devices in a distributed manner,
add a new CPU ID to the RAPL power capping driver and improve it, drop
a cpufreq driver belonging to a platform that is not supported any
more, drop two redundant cpufreq driver flags, update cpufreq drivers
(intel_pstate, brcmstb-avs, qcom-hw), update the operating performance
points (OPP) framework (code cleanups, new helpers, devfreq-related
modifications), clean up devfreq, extend the PM clock layer, update
the cpupower utility and make assorted janitorial changes.
Specifics:
- Add new power capping facility called DTPM (Dynamic Thermal Power
Management), based on the existing power capping framework, to
allow aggregate power constraints to be applied to sets of devices
in a distributed manner, along with a CPU backend driver based on
the Energy Model (Daniel Lezcano, Dan Carpenter, Colin Ian King).
- Add AlderLake Mobile support to the Intel RAPL power capping driver
and make it use the topology interface when laying out the system
topology (Zhang Rui, Yunfeng Ye).
- Drop the cpufreq tango driver belonging to a platform that is not
supported any more (Arnd Bergmann).
- Drop the redundant CPUFREQ_STICKY and CPUFREQ_PM_NO_WARN cpufreq
driver flags (Viresh Kumar).
- Update cpufreq drivers:
* Fix max CPU frequency discovery in the intel_pstate driver and
make janitorial changes in it (Chen Yu, Rafael Wysocki, Nigel
Christian).
* Fix resource leaks in the brcmstb-avs-cpufreq driver (Christophe
JAILLET).
* Make the tegra20 driver use the resource-managed API (Dmitry
Osipenko).
* Enable boost support in the qcom-hw driver (Shawn Guo).
- Update the operating performance points (OPP) framework:
* Clean up the OPP core (Dmitry Osipenko, Viresh Kumar).
* Extend the OPP API by adding new helpers to it (Dmitry Osipenko,
Viresh Kumar).
* Allow required OPPs to be used for devfreq devices and update
the devfreq governor code accordingly (Saravana Kannan).
* Prepare the framework for introducing new dev_pm_opp_set_opp()
helper (Viresh Kumar).
* Drop dev_pm_opp_set_bw() and update related drivers (Viresh
Kumar).
* Allow lazy linking of required-OPPs (Viresh Kumar).
- Simplify and clean up devfreq somewhat (Lukasz Luba, Yang Li,
Pierre Kuo).
- Update the generic power domains (genpd) framework:
* Use device's next wakeup to determine domain idle state (Lina
Iyer).
* Improve initialization and debug (Dmitry Osipenko).
* Simplify computations (Abaci Team).
- Make janitorial changes in the core code handling system sleep and
PM-runtime (Bhaskar Chowdhury, Bjorn Helgaas, Rikard Falkeborn,
Zqiang).
- Update the MAINTAINERS entry for the exynos cpuidle driver and drop
DEBUG definition from intel_idle (Krzysztof Kozlowski, Tom Rix).
- Extend the PM clock layer to cover clocks that must sleep (Nicolas
Pitre).
- Update the cpupower utility:
* Update cpupower command, add support for AMD family 0x19 and
clean up the code to remove many of the family checks to make
future family updates easier (Nathan Fontenot, Robert Richter).
* Add Makefile dependencies for install targets to allow building
cpupower in parallel rather than serially (Ivan Babrou).
- Make janitorial changes in power management Kconfig (Lukasz Luba)"
* tag 'pm-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (89 commits)
MAINTAINERS: cpuidle: exynos: include header in file pattern
powercap: intel_rapl: Use topology interface in rapl_init_domains()
powercap: intel_rapl: Use topology interface in rapl_add_package()
PM: sleep: Constify static struct attribute_group
PM: Kconfig: remove unneeded "default n" options
PM: EM: update Kconfig description and drop "default n" option
cpufreq: Remove unused flag CPUFREQ_PM_NO_WARN
cpufreq: Remove CPUFREQ_STICKY flag
PM / devfreq: Add required OPPs support to passive governor
PM / devfreq: Cache OPP table reference in devfreq
OPP: Add function to look up required OPP's for a given OPP
PM / devfreq: rk3399_dmc: Remove unneeded semicolon
opp: Replace ENOTSUPP with EOPNOTSUPP
opp: Fix "foo * bar" should be "foo *bar"
opp: Don't ignore clk_get() errors other than -ENOENT
opp: Update bandwidth requirements based on scaling up/down
opp: Allow lazy-linking of required-opps
opp: Remove dev_pm_opp_set_bw()
devfreq: tegra30: Migrate to dev_pm_opp_set_opp()
drm: msm: Migrate to dev_pm_opp_set_opp()
...
|
||
|
Linus Torvalds
|
51e6d17809 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from David Miller:
"Here is what we have this merge window:
1) Support SW steering for mlx5 Connect-X6Dx, from Yevgeny Kliteynik.
2) Add RSS multi group support to octeontx2-pf driver, from Geetha
Sowjanya.
3) Add support for KS8851 PHY. From Marek Vasut.
4) Add support for GarfieldPeak bluetooth controller from Kiran K.
5) Add support for half-duplex tcan4x5x can controllers.
6) Add batch skb rx processing to bcrm63xx_enet, from Sieng Piaw
Liew.
7) Rework RX port offload infrastructure, particularly wrt, UDP
tunneling, from Jakub Kicinski.
8) Add BCM72116 PHY support, from Florian Fainelli.
9) Remove Dsa specific notifiers, they are unnecessary. From Vladimir
Oltean.
10) Add support for picosecond rx delay in dwmac-meson8b chips. From
Martin Blumenstingl.
11) Support TSO on xfrm interfaces from Eyal Birger.
12) Add support for MP_PRIO to mptcp stack, from Geliang Tang.
13) Support BCM4908 integrated switch, from Rafał Miłecki.
14) Support for directly accessing kernel module variables via module
BTF info, from Andrii Naryiko.
15) Add DASH (esktop and mobile Architecture for System Hardware)
support to r8169 driver, from Heiner Kallweit.
16) Add rx vlan filtering to dpaa2-eth, from Ionut-robert Aron.
17) Add support for 100 base0x SFP devices, from Bjarni Jonasson.
18) Support link aggregation in DSA, from Tobias Waldekranz.
19) Support for bitwidse atomics in bpf, from Brendan Jackman.
20) SmartEEE support in at803x driver, from Russell King.
21) Add support for flow based tunneling to GTP, from Pravin B Shelar.
22) Allow arbitrary number of interconnrcts in ipa, from Alex Elder.
23) TLS RX offload for bonding, from Tariq Toukan.
24) RX decap offklload support in mac80211, from Felix Fietkou.
25) devlink health saupport in octeontx2-af, from George Cherian.
26) Add TTL attr to SCM_TIMESTAMP_OPT_STATS, from Yousuk Seung
27) Delegated actionss support in mptcp, from Paolo Abeni.
28) Support receive timestamping when doin zerocopy tcp receive. From
Arjun Ray.
29) HTB offload support for mlx5, from Maxim Mikityanskiy.
30) UDP GRO forwarding, from Maxim Mikityanskiy.
31) TAPRIO offloading in dsa hellcreek driver, from Kurt Kanzenbach.
32) Weighted random twos choice algorithm for ipvs, from Darby Payne.
33) Fix netdev registration deadlock, from Johannes Berg.
34) Various conversions to new tasklet api, from EmilRenner Berthing.
35) Bulk skb allocations in veth, from Lorenzo Bianconi.
36) New ethtool interface for lane setting, from Danielle Ratson.
37) Offload failiure notifications for routes, from Amit Cohen.
38) BCM4908 support, from Rafał Miłecki.
39) Support several new iwlwifi chips, from Ihab Zhaika.
40) Flow drector support for ipv6 in i40e, from Przemyslaw Patynowski.
41) Support for mhi prrotocols, from Loic Poulain.
42) Optimize bpf program stats.
43) Implement RFC6056, for better port randomization, from Eric
Dumazet.
44) hsr tag offloading support from George McCollister.
45) Netpoll support in qede, from Bhaskar Upadhaya.
46) 2005/400g speed support in bonding 3ad mode, from Nikolay
Aleksandrov.
47) Netlink event support in mptcp, from Florian Westphal.
48) Better skbuff caching, from Alexander Lobakin.
49) MRP (Media Redundancy Protocol) offloading in DSA and a few
drivers, from Horatiu Vultur.
50) mqprio saupport in mvneta, from Maxime Chevallier.
51) Remove of_phy_attach, no longer needed, from Florian Fainelli"
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1766 commits)
octeontx2-pf: Fix otx2_get_fecparam()
cteontx2-pf: cn10k: Prevent harmless double shift bugs
net: stmmac: Add PCI bus info to ethtool driver query output
ptp: ptp_clockmatrix: clean-up - parenthesis around a == b are unnecessary
ptp: ptp_clockmatrix: Simplify code - remove unnecessary `err` variable.
ptp: ptp_clockmatrix: Coding style - tighten vertical spacing.
ptp: ptp_clockmatrix: Clean-up dev_*() messages.
ptp: ptp_clockmatrix: Remove unused header declarations.
ptp: ptp_clockmatrix: Add alignment of 1 PPS to idtcm_perout_enable.
ptp: ptp_clockmatrix: Add wait_for_sys_apll_dpll_lock.
net: stmmac: dwmac-sun8i: Add a shutdown callback
net: stmmac: dwmac-sun8i: Minor probe function cleanup
net: stmmac: dwmac-sun8i: Use reset_control_reset
net: stmmac: dwmac-sun8i: Remove unnecessary PHY power check
net: stmmac: dwmac-sun8i: Return void from PHY unpower
r8169: use macro pm_ptr
net: mdio: Remove of_phy_attach()
net: mscc: ocelot: select PACKING in the Kconfig
net: re-solve some conflicts after net -> net-next merge
net: dsa: tag_rtl4_a: Support also egress tags
...
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||
|
Christoph Hellwig
|
ca10d0f8e5 |
swiotlb: clean up swiotlb_tbl_unmap_single
Remove a layer of pointless indentation, replace a hard to follow ternary expression with a plain if/else. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jianxiong Gao <jxgao@google.com> Tested-by: Jianxiong Gao <jxgao@google.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
||
|
Christoph Hellwig
|
c32a77fd18 |
swiotlb: factor out a nr_slots helper
Factor out a helper to find the number of slots for a given size. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jianxiong Gao <jxgao@google.com> Tested-by: Jianxiong Gao <jxgao@google.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
||
|
Christoph Hellwig
|
c7fbeca757 |
swiotlb: factor out an io_tlb_offset helper
Replace the very genericly named OFFSET macro with a little inline helper that hardcodes the alignment to the only value ever passed. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jianxiong Gao <jxgao@google.com> Tested-by: Jianxiong Gao <jxgao@google.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
||
|
Christoph Hellwig
|
b5d7ccb7aa |
swiotlb: add a IO_TLB_SIZE define
Add a new IO_TLB_SIZE define instead open coding it using IO_TLB_SHIFT all over. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jianxiong Gao <jxgao@google.com> Tested-by: Jianxiong Gao <jxgao@google.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
||
Masami Hiramatsu
|
c85c9a2c6e |
kprobes: Fix to delay the kprobes jump optimization
Commit |
||
Yue Hu
|
e209cb51bf |
cpufreq: schedutil: Remove update_lock comment from struct sugov_policy definition
Currently, update_lock is also used in sugov_update_single_freq(). The comment is not helpful anymore. Signed-off-by: Yue Hu <huyue2@yulong.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> [ rjw: Subject edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Yue Hu
|
71f1309f4f |
cpufreq: schedutil: Remove needless sg_policy parameter from ignore_dl_rate_limit()
Since sg_policy is a member of struct sugov_cpu. Also remove the local variable in sugov_update_single_common() to make the code more clean. Signed-off-by: Yue Hu <huyue2@yulong.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> [ rjw: Minor subject edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
Frederic Weisbecker
|
4ae7dc97f7 |
entry/kvm: Explicitly flush pending rcuog wakeup before last rescheduling point
Following the idle loop model, cleanly check for pending rcuog wakeup before the last rescheduling point upon resuming to guest mode. This way we can avoid to do it from rcu_user_enter() with the last resort self-IPI hack that enforces rescheduling. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20210131230548.32970-6-frederic@kernel.org |
||
|
Frederic Weisbecker
|
47b8ff194c |
entry: Explicitly flush pending rcuog wakeup before last rescheduling point
Following the idle loop model, cleanly check for pending rcuog wakeup before the last rescheduling point on resuming to user mode. This way we can avoid to do it from rcu_user_enter() with the last resort self-IPI hack that enforces rescheduling. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20210131230548.32970-5-frederic@kernel.org |
||
|
Frederic Weisbecker
|
f8bb5cae96 |
rcu/nocb: Trigger self-IPI on late deferred wake up before user resume
Entering RCU idle mode may cause a deferred wake up of an RCU NOCB_GP
kthread (rcuog) to be serviced.
Unfortunately the call to rcu_user_enter() is already past the last
rescheduling opportunity before we resume to userspace or to guest mode.
We may escape there with the woken task ignored.
The ultimate resort to fix every callsites is to trigger a self-IPI
(nohz_full depends on arch to implement arch_irq_work_raise()) that will
trigger a reschedule on IRQ tail or guest exit.
Eventually every site that want a saner treatment will need to carefully
place a call to rcu_nocb_flush_deferred_wakeup() before the last explicit
need_resched() check upon resume.
Fixes:
|
||
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Frederic Weisbecker
|
43789ef3f7 |
rcu/nocb: Perform deferred wake up before last idle's need_resched() check
Entering RCU idle mode may cause a deferred wake up of an RCU NOCB_GP
kthread (rcuog) to be serviced.
Usually a local wake up happening while running the idle task is handled
in one of the need_resched() checks carefully placed within the idle
loop that can break to the scheduler.
Unfortunately the call to rcu_idle_enter() is already beyond the last
generic need_resched() check and we may halt the CPU with a resched
request unhandled, leaving the task hanging.
Fix this with splitting the rcuog wakeup handling from rcu_idle_enter()
and place it before the last generic need_resched() check in the idle
loop. It is then assumed that no call to call_rcu() will be performed
after that in the idle loop until the CPU is put in low power mode.
Fixes:
|
||
|
Frederic Weisbecker
|
54b7429eff |
rcu: Pull deferred rcuog wake up to rcu_eqs_enter() callers
Deferred wakeup of rcuog kthreads upon RCU idle mode entry is going to be handled differently whether initiated by idle, user or guest. Prepare with pulling that control up to rcu_eqs_enter() callers. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20210131230548.32970-2-frederic@kernel.org |
||
Juri Lelli
|
e0ee463c93 |
sched/features: Distinguish between NORMAL and DEADLINE hrtick
The HRTICK feature has traditionally been servicing configurations that need precise preemptions point for NORMAL tasks. More recently, the feature has been extended to also service DEADLINE tasks with stringent runtime enforcement needs (e.g., runtime < 1ms with HZ=1000). Enabling HRTICK sched feature currently enables the additional timer and task tick for both classes, which might introduced undesired overhead for no additional benefit if one needed it only for one of the cases. Separate HRTICK sched feature in two (and leave the traditional case name unmodified) so that it can be selectively enabled when needed. With: $ echo HRTICK > /sys/kernel/debug/sched_features the NORMAL/fair hrtick gets enabled. With: $ echo HRTICK_DL > /sys/kernel/debug/sched_features the DEADLINE hrtick gets enabled. Signed-off-by: Juri Lelli <juri.lelli@redhat.com> Signed-off-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com> Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210208073554.14629-3-juri.lelli@redhat.com |
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|
Juri Lelli
|
156ec6f42b |
sched/features: Fix hrtick reprogramming
Hung tasks and RCU stall cases were reported on systems which were not
100% busy. Investigation of such unexpected cases (no sign of potential
starvation caused by tasks hogging the system) pointed out that the
periodic sched tick timer wasn't serviced anymore after a certain point
and that caused all machinery that depends on it (timers, RCU, etc.) to
stop working as well. This issues was however only reproducible if
HRTICK was enabled.
Looking at core dumps it was found that the rbtree of the hrtimer base
used also for the hrtick was corrupted (i.e. next as seen from the base
root and actual leftmost obtained by traversing the tree are different).
Same base is also used for periodic tick hrtimer, which might get "lost"
if the rbtree gets corrupted.
Much alike what described in commit
|
||
Dietmar Eggemann
|
de40f33e78 |
sched/deadline: Reduce rq lock contention in dl_add_task_root_domain()
dl_add_task_root_domain() is called during sched domain rebuild:
rebuild_sched_domains_locked()
partition_and_rebuild_sched_domains()
rebuild_root_domains()
for all top_cpuset descendants:
update_tasks_root_domain()
for all tasks of cpuset:
dl_add_task_root_domain()
Change it so that only the task pi lock is taken to check if the task
has a SCHED_DEADLINE (DL) policy. In case that p is a DL task take the
rq lock as well to be able to safely de-reference root domain's DL
bandwidth structure.
Most of the tasks will have another policy (namely SCHED_NORMAL) and
can now bail without taking the rq lock.
One thing to note here: Even in case that there aren't any DL user
tasks, a slow frequency switching system with cpufreq gov schedutil has
a DL task (sugov) per frequency domain running which participates in DL
bandwidth management.
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Quentin Perret <qperret@google.com>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Acked-by: Juri Lelli <juri.lelli@redhat.com>
Link: https://lkml.kernel.org/r/20210119083542.19856-1-dietmar.eggemann@arm.com
|
||
Sven Schnelle
|
b0d6d47896 |
uprobes: (Re)add missing get_uprobe() in __find_uprobe()
commit c6bc9bd06dff ("rbtree, uprobes: Use rbtree helpers")
accidentally removed the refcount increase. Add it again.
Fixes: c6bc9bd06dff ("rbtree, uprobes: Use rbtree helpers")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210209150711.36778-1-svens@linux.ibm.com
|
||
Sebastian Andrzej Siewior
|
f9d34595ae |
smp: Process pending softirqs in flush_smp_call_function_from_idle()
send_call_function_single_ipi() may wake an idle CPU without sending an
IPI. The woken up CPU will process the SMP-functions in
flush_smp_call_function_from_idle(). Any raised softirq from within the
SMP-function call will not be processed.
Should the CPU have no tasks assigned, then it will go back to idle with
pending softirqs and the NOHZ will rightfully complain.
Process pending softirqs on return from flush_smp_call_function_queue().
Fixes:
|
||
Peter Zijlstra
|
ef72661e28 |
sched: Harden PREEMPT_DYNAMIC
Use the new EXPORT_STATIC_CALL_TRAMP() / static_call_mod() to unexport the static_call_key for the PREEMPT_DYNAMIC calls such that modules can no longer update these calls. Having modules change/hi-jack the preemption calls would be horrible. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
Josh Poimboeuf
|
73f44fe19d |
static_call: Allow module use without exposing static_call_key
When exporting static_call_key; with EXPORT_STATIC_CALL*(), the module can use static_call_update() to change the function called. This is not desirable in general. Not exporting static_call_key however also disallows usage of static_call(), since objtool needs the key to construct the static_call_site. Solve this by allowing objtool to create the static_call_site using the trampoline address when it builds a module and cannot find the static_call_key symbol. The module loader will then try and map the trampole back to a key before it constructs the normal sites list. Doing this requires a trampoline -> key associsation, so add another magic section that keeps those. Originally-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210127231837.ifddpn7rhwdaepiu@treble |
||
|
Peter Zijlstra
|
e59e10f8ef |
sched: Add /debug/sched_preempt
Add a debugfs file to muck about with the preempt mode at runtime. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/YAsGiUYf6NyaTplX@hirez.programming.kicks-ass.net |
||
|
Peter Zijlstra (Intel)
|
826bfeb37b |
preempt/dynamic: Support dynamic preempt with preempt= boot option
Support the preempt= boot option and patch the static call sites accordingly. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210118141223.123667-9-frederic@kernel.org |
||
|
Peter Zijlstra (Intel)
|
40607ee97e |
preempt/dynamic: Provide irqentry_exit_cond_resched() static call
Provide static call to control IRQ preemption (called in CONFIG_PREEMPT) so that we can override its behaviour when preempt= is overriden. Since the default behaviour is full preemption, its call is initialized to provide IRQ preemption when preempt= isn't passed. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210118141223.123667-8-frederic@kernel.org |
||
|
Peter Zijlstra (Intel)
|
2c9a98d3bc |
preempt/dynamic: Provide preempt_schedule[_notrace]() static calls
Provide static calls to control preempt_schedule[_notrace]()
(called in CONFIG_PREEMPT) so that we can override their behaviour when
preempt= is overriden.
Since the default behaviour is full preemption, both their calls are
initialized to the arch provided wrapper, if any.
[fweisbec: only define static calls when PREEMPT_DYNAMIC, make it less
dependent on x86 with __preempt_schedule_func]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210118141223.123667-7-frederic@kernel.org
|
||
|
Peter Zijlstra (Intel)
|
b965f1ddb4 |
preempt/dynamic: Provide cond_resched() and might_resched() static calls
Provide static calls to control cond_resched() (called in !CONFIG_PREEMPT)
and might_resched() (called in CONFIG_PREEMPT_VOLUNTARY) to that we
can override their behaviour when preempt= is overriden.
Since the default behaviour is full preemption, both their calls are
ignored when preempt= isn't passed.
[fweisbec: branch might_resched() directly to __cond_resched(), only
define static calls when PREEMPT_DYNAMIC]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210118141223.123667-6-frederic@kernel.org
|
||
Michal Hocko
|
6ef869e064 |
preempt: Introduce CONFIG_PREEMPT_DYNAMIC
Preemption mode selection is currently hardcoded on Kconfig choices. Introduce a dedicated option to tune preemption flavour at boot time, This will be only available on architectures efficiently supporting static calls in order not to tempt with the feature against additional overhead that might be prohibitive or undesirable. CONFIG_PREEMPT_DYNAMIC is automatically selected by CONFIG_PREEMPT if the architecture provides the necessary support (CONFIG_STATIC_CALL_INLINE, CONFIG_GENERIC_ENTRY, and provide with __preempt_schedule_function() / __preempt_schedule_notrace_function()). Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> [peterz: relax requirement to HAVE_STATIC_CALL] Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210118141223.123667-5-frederic@kernel.org |
||
|
Peter Zijlstra
|
3f2a8fc4b1 |
static_call/x86: Add __static_call_return0()
Provide a stub function that return 0 and wire up the static call site patching to replace the CALL with a single 5 byte instruction that clears %RAX, the return value register. The function can be cast to any function pointer type that has a single %RAX return (including pointers). Also provide a version that returns an int for convenience. We are clearing the entire %RAX register in any case, whether the return value is 32 or 64 bits, since %RAX is always a scratch register anyway. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210118141223.123667-2-frederic@kernel.org |
||
|
Dietmar Eggemann
|
c541bb7835 |
sched/core: Update task_prio() function header
The description of the RT offset and the values for 'normal' tasks needs
update. Moreover there are DL tasks now.
task_prio() has to stay like it is to guarantee compatibility with the
/proc/<pid>/stat priority field:
# cat /proc/<pid>/stat | awk '{ print $18; }'
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210128131040.296856-4-dietmar.eggemann@arm.com
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Dietmar Eggemann
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9d061ba6bc |
sched: Remove USER_PRIO, TASK_USER_PRIO and MAX_USER_PRIO
The only remaining use of MAX_USER_PRIO (and USER_PRIO) is the SCALE_PRIO() definition in the PowerPC Cell architecture's Synergistic Processor Unit (SPU) scheduler. TASK_USER_PRIO isn't used anymore. Commit |
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Dietmar Eggemann
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ae18ad281e |
sched: Remove MAX_USER_RT_PRIO
Commit
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Dietmar Eggemann
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71e5f6644f |
sched/topology: Fix sched_domain_topology_level alloc in sched_init_numa()
Commit "sched/topology: Make sched_init_numa() use a set for the
deduplicating sort" allocates 'i + nr_levels (level)' instead of
'i + nr_levels + 1' sched_domain_topology_level.
This led to an Oops (on Arm64 juno with CONFIG_SCHED_DEBUG):
sched_init_domains
build_sched_domains()
__free_domain_allocs()
__sdt_free() {
...
for_each_sd_topology(tl)
...
sd = *per_cpu_ptr(sdd->sd, j); <--
...
}
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Tested-by: Barry Song <song.bao.hua@hisilicon.com>
Link: https://lkml.kernel.org/r/6000e39e-7d28-c360-9cd6-8798fd22a9bf@arm.com
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Peter Zijlstra
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5a7987253e |
rbtree, rtmutex: Use rb_add_cached()
Reduce rbtree boiler plate by using the new helpers. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Davidlohr Bueso <dbueso@suse.de> |
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Peter Zijlstra
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a905e84e64 |
rbtree, uprobes: Use rbtree helpers
Reduce rbtree boilerplate by using the new helpers. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Davidlohr Bueso <dbueso@suse.de> |
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Peter Zijlstra
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a3b8986455 |
rbtree, perf: Use new rbtree helpers
Reduce rbtree boiler plate by using the new helpers. One noteworthy change is unification of the various (partial) compare functions. We construct a subtree match by forcing the sub-order to always match, see __group_cmp(). Due to 'const' we had to touch cgroup_id(). Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Davidlohr Bueso <dbueso@suse.de> |
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Peter Zijlstra
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8ecca39483 |
rbtree, sched/deadline: Use rb_add_cached()
Reduce rbtree boiler plate by using the new helpers. Make rb_add_cached() / rb_erase_cached() return a pointer to the leftmost node to aid in updating additional state. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Davidlohr Bueso <dbueso@suse.de> |
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Peter Zijlstra
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bf9be9a163 |
rbtree, sched/fair: Use rb_add_cached()
Reduce rbtree boiler plate by using the new helper function. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Davidlohr Bueso <dbueso@suse.de> |
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Mel Gorman
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9fe1f127b9 |
sched/fair: Merge select_idle_core/cpu()
Both select_idle_core() and select_idle_cpu() do a loop over the same cpumask. Observe that by clearing the already visited CPUs, we can fold the iteration and iterate a core at a time. All we need to do is remember any non-idle CPU we encountered while scanning for an idle core. This way we'll only iterate every CPU once. Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org> Link: https://lkml.kernel.org/r/20210127135203.19633-5-mgorman@techsingularity.net |
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Mel Gorman
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6cd56ef1df |
sched/fair: Remove select_idle_smt()
In order to make the next patch more readable, and to quantify the actual effectiveness of this pass, start by removing it. Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org> Link: https://lkml.kernel.org/r/20210125085909.4600-4-mgorman@techsingularity.net |
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Ingo Molnar
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ed3cd45f8c |
Linux 5.11
-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmAppPgeHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGeXYH/imZPBd4A1jIMehN 5HV2A53Z+MXmmaMuGj9X1KV6vsf55/xB+IhOoFdtRAIsO8c2yYSCO8i4+4R0XfYA +/YFJeq672rojQnmh6XbpR8dugaAV7CUHy6n7KDsyvtT6EOCpwFSwkOb4X3tBRX6 TlYgm2d/xgV/wRHSgLVugK0MdFCLMAnyb7mkPfar9QrMgG1BiDKLq07xmwnS23On TkqpJ9yZ/rJpUrrUqQYPShSO/FmA+fSfWs0CDv7EIrJ40LUScD6PZxSHWTIHtjLk E4jFda6wuqLRVWsBwaBzUIdD0zk7X5quHRzEpbC5ga16SK6yrWvE5YJJXCguIEuZ f3FMRYs= =CAjn -----END PGP SIGNATURE----- Merge tag 'v5.11' into sched/core, to pick up fixes & refresh the branch Signed-off-by: Ingo Molnar <mingo@kernel.org> |