Page writeback doesn't hold a page reference, which allows truncate to
free a page the second PageWriteback is cleared. This used to require
special attention in test_clear_page_writeback(), where we had to be
careful not to rely on the unstable page->memcg binding and look up all
the necessary information before clearing the writeback flag.
Since commit 073861ed77 ("mm: fix VM_BUG_ON(PageTail) and
BUG_ON(PageWriteback)") test_clear_page_writeback() is called with an
explicit reference on the page, and this dance is no longer needed.
Use unlock_page_memcg() and dec_lruvec_page_state() directly.
This removes the last user of the lock_page_memcg() return value, change
it to void. Touch up the comments in there as well. This also removes
the last extern user of __unlock_page_memcg(), make it static. Further,
it removes the last user of dec_lruvec_state(), delete it, along with a
few other unused helpers.
Link: https://lkml.kernel.org/r/YCQbYAWg4nvBFL6h@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If the I/O completed successfully, the page will remain Uptodate, even
if it is subsequently truncated. If the I/O completed with an error,
this check would cause us to retry the I/O if the page were truncated
before we woke up. There is no need to retry the I/O; the I/O to fill
the page failed, so we can legitimately just return -EIO.
This code was originally added by commit 56f0d5fe6851 ("[PATCH]
readpage-vs-invalidate fix") in 2005 (this commit ID is from the
linux-fullhistory tree; it is also commit ba1f08f14b52 in tglx-history).
At the time, truncate_complete_page() called ClearPageUptodate(), and so
this was fixing a real bug. In 2008, commit 84209e02de ("mm: dont clear
PG_uptodate on truncate/invalidate") removed the call to
ClearPageUptodate, and this check has been unnecessary ever since.
It doesn't do any real harm, but there's no need to keep it.
Link: https://lkml.kernel.org/r/20210303222547.1056428-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
After splitting generic_file_buffered_read() into smaller parts, it turns
out we can reuse one of the parts in filemap_fault(). This fixes an
oversight -- waiting for the I/O to complete is now interruptible by a
fatal signal. And it saves us a few bytes of text in an unlikely path.
$ ./scripts/bloat-o-meter before.o after.o
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-207 (-207)
Function old new delta
filemap_fault 2187 1980 -207
Total: Before=37491, After=37284, chg -0.55%
Link: https://lkml.kernel.org/r/20210226140011.2883498-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For reads, use the better variant of checking for the need to call
filemap_write_and_wait_range() when doing O_DIRECT. This avoids falling
back to the slow path for IOCB_NOWAIT, if there are no pages to wait for
(or write out).
Link: https://lkml.kernel.org/r/20210224164455.1096727-4-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For the generic page cache read helper, use the better variant of checking
for the need to call filemap_write_and_wait_range() when doing O_DIRECT
reads. This avoids falling back to the slow path for IOCB_NOWAIT, if
there are no pages to wait for (or write out).
Link: https://lkml.kernel.org/r/20210224164455.1096727-3-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "Improve IOCB_NOWAIT O_DIRECT reads", v3.
An internal workload complained because it was using too much CPU, and
when I took a look, we had a lot of io_uring workers going to town.
For an async buffered read like workload, I am normally expecting _zero_
offloads to a worker thread, but this one had tons of them. I'd drop
caches and things would look good again, but then a minute later we'd
regress back to using workers. Turns out that every minute something
was reading parts of the device, which would add page cache for that
inode. I put patches like these in for our kernel, and the problem was
solved.
Don't -EAGAIN IOCB_NOWAIT dio reads just because we have page cache
entries for the given range. This causes unnecessary work from the
callers side, when the IO could have been issued totally fine without
blocking on writeback when there is none.
This patch (of 3):
For O_DIRECT reads/writes, we check if we need to issue a call to
filemap_write_and_wait_range() to issue and/or wait for writeback for any
page in the given range. The existing mechanism just checks for a page in
the range, which is suboptimal for IOCB_NOWAIT as we'll fallback to the
slow path (and needing retry) if there's just a clean page cache page in
the range.
Provide filemap_range_needs_writeback() which tries a little harder to
check if we actually need to issue and/or wait for writeback in the range.
Link: https://lkml.kernel.org/r/20210224164455.1096727-1-axboe@kernel.dk
Link: https://lkml.kernel.org/r/20210224164455.1096727-2-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
early_memtest() does not get called from all architectures. Hence
enabling CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel
command line option might not trigger the memory pattern tests as would be
expected in normal circumstances. This situation is misleading.
The change here prevents the above mentioned problem after introducing a
new config option ARCH_USE_MEMTEST that should be subscribed on platforms
that call early_memtest(), in order to enable the config CONFIG_MEMTEST.
Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would
not be tested anyway.
Link: https://lkml.kernel.org/r/1617269193-22294-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com> (arm64)
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will@kernel.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When page_poison detects page corruption it's useful to see who freed a
page recently to have a guess where write-after-free corruption happens.
After this change corruption report has extra page data.
Example report from real corruption (includes only page_pwner part):
pagealloc: memory corruption
e00000014cd61d10: 11 00 00 00 00 00 00 00 30 1d d2 ff ff 0f 00 60 ........0......`
e00000014cd61d20: b0 1d d2 ff ff 0f 00 60 90 fe 1c 00 08 00 00 20 .......`.......
...
CPU: 1 PID: 220402 Comm: cc1plus Not tainted 5.12.0-rc5-00107-g9720c6f59ecf #245
Hardware name: hp server rx3600, BIOS 04.03 04/08/2008
...
Call Trace:
[<a000000100015210>] show_stack+0x90/0xc0
[<a000000101163390>] dump_stack+0x150/0x1c0
[<a0000001003f1e90>] __kernel_unpoison_pages+0x410/0x440
[<a0000001003c2460>] get_page_from_freelist+0x1460/0x2ca0
[<a0000001003c6be0>] __alloc_pages_nodemask+0x3c0/0x660
[<a0000001003ed690>] alloc_pages_vma+0xb0/0x500
[<a00000010037deb0>] __handle_mm_fault+0x1230/0x1fe0
[<a00000010037ef70>] handle_mm_fault+0x310/0x4e0
[<a00000010005dc70>] ia64_do_page_fault+0x1f0/0xb80
[<a00000010000ca00>] ia64_leave_kernel+0x0/0x270
page_owner tracks the page as freed
page allocated via order 0, migratetype Movable,
gfp_mask 0x100dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), pid 37, ts 8173444098740
__reset_page_owner+0x40/0x200
free_pcp_prepare+0x4d0/0x600
free_unref_page+0x20/0x1c0
__put_page+0x110/0x1a0
migrate_pages+0x16d0/0x1dc0
compact_zone+0xfc0/0x1aa0
proactive_compact_node+0xd0/0x1e0
kcompactd+0x550/0x600
kthread+0x2c0/0x2e0
call_payload+0x50/0x80
Here we can see that page was freed by page migration but something
managed to write to it afterwards.
[slyfox@gentoo.org: s/dump_page_owner/dump_page/, per Vlastimil]
Link: https://lkml.kernel.org/r/20210407230800.1086854-1-slyfox@gentoo.org
Link: https://lkml.kernel.org/r/20210404141735.2152984-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Before the change page_owner recursion was detected via fetching
backtrace and inspecting it for current instruction pointer.
It has a few problems:
- it is slightly slow as it requires extra backtrace and a linear stack
scan of the result
- it is too late to check if backtrace fetching required memory
allocation itself (ia64's unwinder requires it).
To simplify recursion tracking let's use page_owner recursion flag in
'struct task_struct'.
The change make page_owner=on work on ia64 by avoiding infinite
recursion in:
kmalloc()
-> __set_page_owner()
-> save_stack()
-> unwind() [ia64-specific]
-> build_script()
-> kmalloc()
-> __set_page_owner() [we short-circuit here]
-> save_stack()
-> unwind() [recursion]
Link: https://lkml.kernel.org/r/20210402115342.1463781-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ben Segall <bsegall@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
I tried to use page_owner=1 for a while noticed too late it had no effect
as opposed to similar init_on_alloc=1 (these work).
Let's make them consistent.
The change decreses binary size slightly:
text data bss dec hex filename
12408 321 17 12746 31ca mm/page_owner.o.before
12320 321 17 12658 3172 mm/page_owner.o.after
Link: https://lkml.kernel.org/r/20210401210909.3532086-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Very minor optimization.
Link: https://lkml.kernel.org/r/20210401212445.3534721-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Since commit 5556cfe8d9 ("mm, page_owner: fix off-by-one error in
__set_page_owner_handle()") introduced, the parameter 'page' will not
used, hence it need to be removed.
Link: https://lkml.kernel.org/r/1616602022-43545-1-git-send-email-zhongjiang-ali@linux.alibaba.com
Signed-off-by: zhongjiang-ali <zhongjiang-ali@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Collect the time when each allocation is freed, to help with memory
analysis with kdump/ramdump. Add the timestamp also in the page_owner
debugfs file and print it in dump_page().
Having another timestamp when we free the page helps for debugging page
migration issues. For example both alloc and free timestamps being the
same can gave hints that there is an issue with migrating memory, as
opposed to a page just being dropped during migration.
Link: https://lkml.kernel.org/r/20210203175905.12267-1-georgi.djakov@linaro.org
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit ca0cab65ea ("mm, slub: introduce static key for slub_debug()")
introduced a static key to optimize the case where no debugging is
enabled for any cache. The static key is enabled when slub_debug boot
parameter is passed, or CONFIG_SLUB_DEBUG_ON enabled.
However, some caches might be created with one or more debugging flags
explicitly passed to kmem_cache_create(), and the commit missed this.
Thus the debugging functionality would not be actually performed for
these caches unless the static key gets enabled by boot param or config.
This patch fixes it by checking for debugging flags passed to
kmem_cache_create() and enabling the static key accordingly.
Note such explicit debugging flags should not be used outside of
debugging and testing as they will now enable the static key globally.
btrfs_init_cachep() creates a cache with SLAB_RED_ZONE but that's a
mistake that's being corrected [1]. rcu_torture_stats() creates a cache
with SLAB_STORE_USER, but that is a testing module so it's OK and will
start working as intended after this patch.
Also note that in case of backports to kernels before v5.12 that don't
have 59450bbc12 ("mm, slab, slub: stop taking cpu hotplug lock"),
static_branch_enable_cpuslocked() should be used.
[1] https://lore.kernel.org/linux-btrfs/20210315141824.26099-1-dsterba@suse.com/
Link: https://lkml.kernel.org/r/20210315153415.24404-1-vbabka@suse.cz
Fixes: ca0cab65ea ("mm, slub: introduce static key for slub_debug()")
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reported-by: Oliver Glitta <glittao@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is a minor addition to the allocator setup options to provide a
simple way to on demand enable back cache merging for builds that by
default run with CONFIG_SLAB_MERGE_DEFAULT not set.
Link: https://lkml.kernel.org/r/20210319194506.200159-1-aquini@redhat.com
Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit d6ad3e286d ("softlockup: Add sched_clock_tick() to avoid kernel
warning on kgdb resume") introduced touch_softlockup_watchdog_sync().
It solved a problem when the watchdog was touched in an atomic context,
the timer callback was proceed right after releasing interrupts, and the
local clock has not been updated yet. In this case, sched_clock_tick()
was called in watchdog_timer_fn() before updating the timer.
So far so good.
Later commit 5d1c0f4a80 ("watchdog: add check for suspended vm in
softlockup detector") added two kvm_check_and_clear_guest_paused()
calls. They touch the watchdog when the guest has been sleeping.
The code makes my head spin around.
Scenario 1:
+ guest did sleep:
+ PVCLOCK_GUEST_STOPPED is set
+ 1st watchdog_timer_fn() invocation:
+ the watchdog is not touched yet
+ is_softlockup() returns too big delay
+ kvm_check_and_clear_guest_paused():
+ clear PVCLOCK_GUEST_STOPPED
+ call touch_softlockup_watchdog_sync()
+ set SOFTLOCKUP_DELAY_REPORT
+ set softlockup_touch_sync
+ return from the timer callback
+ 2nd watchdog_timer_fn() invocation:
+ call sched_clock_tick() even though it is not needed.
The timer callback was invoked again only because the clock
has already been updated in the meantime.
+ call kvm_check_and_clear_guest_paused() that does nothing
because PVCLOCK_GUEST_STOPPED has been cleared already.
+ call update_report_ts() and return. This is fine. Except
that sched_clock_tick() might allow to set it already
during the 1st invocation.
Scenario 2:
+ guest did sleep
+ 1st watchdog_timer_fn() invocation
+ same as in 1st scenario
+ guest did sleep again:
+ set PVCLOCK_GUEST_STOPPED again
+ 2nd watchdog_timer_fn() invocation
+ SOFTLOCKUP_DELAY_REPORT is set from 1st invocation
+ call sched_clock_tick()
+ call kvm_check_and_clear_guest_paused()
+ clear PVCLOCK_GUEST_STOPPED
+ call touch_softlockup_watchdog_sync()
+ set SOFTLOCKUP_DELAY_REPORT
+ set softlockup_touch_sync
+ call update_report_ts() (set real timestamp immediately)
+ return from the timer callback
+ 3rd watchdog_timer_fn() invocation
+ timestamp is set from 2nd invocation
+ softlockup_touch_sync is set but not checked because
the real timestamp is already set
Make the code more straightforward:
1. Always call kvm_check_and_clear_guest_paused() at the very
beginning to handle PVCLOCK_GUEST_STOPPED. It touches the watchdog
when the quest did sleep.
2. Handle the situation when the watchdog has been touched
(SOFTLOCKUP_DELAY_REPORT is set).
Call sched_clock_tick() when touch_*sync() variant was used. It makes
sure that the timestamp will be up to date even when it has been
touched in atomic context or quest did sleep.
As a result, kvm_check_and_clear_guest_paused() is called on a single
location. And the right timestamp is always set when returning from the
timer callback.
Link: https://lkml.kernel.org/r/20210311122130.6788-7-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Any parallel softlockup reports are skipped when one CPU is already
printing backtraces from all CPUs.
The exclusive rights are synchronized using one bit in
soft_lockup_nmi_warn. There is also one memory barrier that does not make
much sense.
Use two barriers on the right location to prevent mixing two reports.
[pmladek@suse.com: use bit lock operations to prevent multiple soft-lockup reports]
Link: https://lkml.kernel.org/r/YFSVsLGVWMXTvlbk@alley
Link: https://lkml.kernel.org/r/20210311122130.6788-6-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The softlockup detector does some gymnastic with the variable
soft_watchdog_warn. It was added by the commit 58687acba5
("lockup_detector: Combine nmi_watchdog and softlockup detector").
The purpose is not completely clear. There are the following clues. They
describe the situation how it looked after the above mentioned commit:
1. The variable was checked with a comment "only warn once".
2. The variable was set when softlockup was reported. It was cleared
only when the CPU was not longer in the softlockup state.
3. watchdog_touch_ts was not explicitly updated when the softlockup
was reported. Without this variable, the report would normally
be printed again during every following watchdog_timer_fn()
invocation.
The logic has got even more tangled up by the commit ed235875e2
("kernel/watchdog.c: print traces for all cpus on lockup detection").
After this commit, soft_watchdog_warn is set only when
softlockup_all_cpu_backtrace is enabled. But multiple reports from all
CPUs are prevented by a new variable soft_lockup_nmi_warn.
Conclusion:
The variable probably never worked as intended. In each case, it has not
worked last many years because the softlockup was reported repeatedly
after the full period defined by watchdog_thresh.
The reason is that watchdog gets touched in many known slow paths, for
example, in printk_stack_address(). This code is called also when
printing the softlockup report. It means that the watchdog timestamp gets
updated after each report.
Solution:
Simply remove the logic. People want the periodic report anyway.
Link: https://lkml.kernel.org/r/20210311122130.6788-5-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The softlockup detector currently shows the time spent since the last
report. As a result it is not clear whether a CPU is infinitely hogged by
a single task or if it is a repeated event.
The situation can be simulated with a simply busy loop:
while (true)
cpu_relax();
The softlockup detector produces:
[ 168.277520] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [cat:4865]
[ 196.277604] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [cat:4865]
[ 236.277522] watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [cat:4865]
But it should be, something like:
[ 480.372418] watchdog: BUG: soft lockup - CPU#2 stuck for 26s! [cat:4943]
[ 508.372359] watchdog: BUG: soft lockup - CPU#2 stuck for 52s! [cat:4943]
[ 548.372359] watchdog: BUG: soft lockup - CPU#2 stuck for 89s! [cat:4943]
[ 576.372351] watchdog: BUG: soft lockup - CPU#2 stuck for 115s! [cat:4943]
For the better output, add an additional timestamp of the last report.
Only this timestamp is reset when the watchdog is intentionally touched
from slow code paths or when printing the report.
Link: https://lkml.kernel.org/r/20210311122130.6788-4-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The softlockup situation might stay for a long time or even forever. When
it happens, the softlockup debug messages are printed in regular intervals
defined by get_softlockup_thresh().
There is a mystery. The repeated message is printed after the full
interval that is defined by get_softlockup_thresh(). But the timer
callback is called more often as defined by sample_period. The code looks
like the soflockup should get reported in every sample_period when it was
once behind the thresh.
It works only by chance. The watchdog is touched when printing the stall
report, for example, in printk_stack_address().
Make the behavior clear and predictable by explicitly updating the
timestamp in watchdog_timer_fn() when the report gets printed.
Link: https://lkml.kernel.org/r/20210311122130.6788-3-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "watchdog/softlockup: Report overall time and some cleanup", v2.
I dug deep into the softlockup watchdog history when time permitted this
year. And reworked the patchset that fixed timestamps and cleaned up the
code[2].
I split it into very small steps and did even more code clean up. The
result looks quite strightforward and I am pretty confident with the
changes.
[1] v2: https://lore.kernel.org/r/20201210160038.31441-1-pmladek@suse.com
[2] v1: https://lore.kernel.org/r/20191024114928.15377-1-pmladek@suse.com
This patch (of 6):
There are many touch_*watchdog() functions. They are called in situations
where the watchdog could report false positives or create unnecessary
noise. For example, when CPU is entering idle mode, a virtual machine is
stopped, or a lot of messages are printed in the atomic context.
These functions set SOFTLOCKUP_RESET instead of a real timestamp. It
allows to call them even in a context where jiffies might be outdated.
For example, in an atomic context.
The real timestamp is set by __touch_watchdog() that is called from the
watchdog timer callback.
Rename this callback to update_touch_ts(). It better describes the effect
and clearly distinguish is from the other touch_*watchdog() functions.
Another motivation is that two timestamps are going to be used. One will
be used for the total softlockup time. The other will be used to measure
time since the last report. The new function name will help to
distinguish which timestamp is being updated.
Link: https://lkml.kernel.org/r/20210311122130.6788-1-pmladek@suse.com
Link: https://lkml.kernel.org/r/20210311122130.6788-2-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix kernel-doc notation function arguments to eliminate two kernel-doc
warnings:
fs_parser.c:322: warning: Excess function parameter 'name' description in 'validate_constant_table'
fs_parser.c:367: warning: Function parameter or member 'name' not described in 'fs_validate_description'
Link: https://lkml.kernel.org/r/20210407033743.9701-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The intent with this code was to return negative error codes but instead
it returns positives.
The problem is how type promotion works with ternary operations. These
functions return long, "ret" is an int and "copied" is a u32. The
negative error code is first cast to u32 so it becomes a high positive and
then cast to long where it's still a positive.
We could fix this by declaring "ret" as a ssize_t but let's just get rid
of the ternaries instead.
Link: https://lkml.kernel.org/r/YIE+/cK1tBzSuQPU@mwanda
Fixes: 5bf2b19320 ("kfifo: add example files to the kernel sample directory")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the following clang warning:
fs/ocfs2/dlm/dlmrecovery.c:129:20: warning: unused function 'dlm_reset_recovery' [-Wunused-function].
Link: https://lkml.kernel.org/r/1618382761-5784-1-git-send-email-jiapeng.chong@linux.alibaba.com
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Reviewed-by: Wengang Wang <wen.gang.wang@oracle.com>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use macro map_flag() is tricky and coccicheck outputs the following
warning:
fs/ocfs2/stack_o2cb.c:69:5-16: Unneeded variable: "o2dlm_flags"
So map flags directly in flags_to_o2dlm() to make coccicheck happy.
And remove BUG_ON() here as well to simplify code since it runs well
a long time.
Link: https://lkml.kernel.org/r/1616138664-35935-1-git-send-email-joseph.qi@linux.alibaba.com
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Wengang Wang <wen.gang.wang@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the following coccicheck warning:
fs/ocfs2/blockcheck.c:232:0-23: WARNING: blockcheck_fops should be defined with DEFINE_DEBUGFS_ATTRIBUTE
Link: https://lkml.kernel.org/r/1614155230-57292-1-git-send-email-yang.lee@linux.alibaba.com
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
checkdeclares: find struct declared more than once. Inspired by
checkincludes.pl.
This script checks for duplicate struct declares. Note that this will not
take into consideration macros, so you should run this only if you know
you do have real dups and do not have them under #ifdef's. You could also
just review the results.
[akpm@linux-foundation.org: fix usage message, grammar]
Link: https://lkml.kernel.org/r/20210401110943.1010796-1-wanjiabing@vivo.com
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Sparse can do constant folding of __builtin_bswap*() since 2017. Also, a
much recent version of Sparse is needed anyway, see commit 6ec4476ac8
("Raise gcc version requirement to 4.9").
So, remove the comment about sparse not being yet able to constant fold
__builtin_bswap*() and remove the corresponding test of __CHECKER__.
Link: https://lkml.kernel.org/r/20210226092236.99369-1-luc.vanoostenryck@gmail.com
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Noticed failure as a crash on ia64 when tried to symbolize all backtraces
collected by page_owner=on:
$ cat /sys/kernel/debug/page_owner
<oops>
CPU: 1 PID: 2074 Comm: cat Not tainted 5.12.0-rc4 #226
Hardware name: hp server rx3600, BIOS 04.03 04/08/2008
ip is at dereference_module_function_descriptor+0x41/0x100
Crash happens at dereference_module_function_descriptor() due to
use-after-free when dereferencing ".opd" section header.
All section headers are already freed after module is laoded successfully.
To keep symbolizer working the change stores ".opd" address and size after
module is relocated to a new place and before section headers are
discarded.
To make similar errors less obscure module_finalize() now zeroes out all
variables relevant to module loading only.
Link: https://lkml.kernel.org/r/20210403074803.3309096-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
DISCONTIGMEM was marked BROKEN in 5.11. Let's remove it.
Booted SPARSEMEM successfully on rx3600.
Link: https://lkml.kernel.org/r/20210404193440.2615358-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
At least ia64_mca_log_sal_error_record() expects some statement:
static void ia64_mca_log_sal_error_record(int sal_info_type)
{
...
if (irq_safe)
IA64_MCA_DEBUG("CPU %d: SAL log contains %s error record
",
smp_processor_id(),
sal_info_type < ARRAY_SIZE(rec_name) ? rec_name[sal_info_type] : "UNKNOWN");
...
}
Instead of fixing all callers the change expicitly makes IA64_MCA_DEBUG
a non-empty expression.
Link: https://lkml.kernel.org/r/20210328215549.830420-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When enabled local debugging via `#define EFI_DEBUG 1` noticed build
failure:
arch/ia64/kernel/efi.c:564:8: error: 'i' undeclared (first use in this function)
While at it fixed benign string format mismatches visible only when
EFI_DEBUG is enabled:
arch/ia64/kernel/efi.c:589:11:
warning: format '%lx' expects argument of type 'long unsigned int',
but argument 5 has type 'u64' {aka 'long long unsigned int'} [-Wformat=]
Link: https://lkml.kernel.org/r/20210328212246.685601-1-slyfox@gentoo.org
Fixes: 14fb420909 ("efi: Merge EFI system table revision and vendor checks")
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Before the change CONFIG_INTEL_IOMMU && !CONFIG_SWIOTLB && !CONFIG_FLATMEM
could skip `set_max_mapnr(max_low_pfn);` if iommu is not present on
system.
Link: https://lkml.kernel.org/r/20210328202439.403601-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It's a remnant of deleted hpsim emulation target removed in fc5bad037
("ia64: remove the hpsim platform").
Link: https://lkml.kernel.org/r/20210323224009.240625-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
John Paul reported a warning about bogus NUMA distance values spurred by
commit:
620a6dc407 ("sched/topology: Make sched_init_numa() use a set for the deduplicating sort")
In this case, the afflicted machine comes up with a reported 256 possible
nodes, all of which are 0 distance away from one another. This was
previously silently ignored, but is now caught by the aforementioned
commit.
The culprit is ia64's node_possible_map which remains unchanged from its
initialization value of NODE_MASK_ALL. In John's case, the machine
doesn't have any SRAT nor SLIT table, but AIUI the possible map remains
untouched regardless of what ACPI tables end up being parsed. Thus,
!online && possible nodes remain with a bogus distance of 0 (distances \in
[0, 9] are "reserved and have no meaning" as per the ACPI spec).
Follow x86 / drivers/base/arch_numa's example and set the possible map to
the parsed map, which in this case seems to be the online map.
Link: http://lore.kernel.org/r/255d6b5d-194e-eb0e-ecdd-97477a534441@physik.fu-berlin.de
Link: https://lkml.kernel.org/r/20210318130617.896309-1-valentin.schneider@arm.com
Fixes: 620a6dc407 ("sched/topology: Make sched_init_numa() use a set for the deduplicating sort")
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: Sergei Trofimovich <slyfox@gentoo.org>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Anatoly Pugachev <matorola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
'linux/pgtable.h' included in 'arch/ia64/kernel/head.S' is duplicated.
Link: https://lkml.kernel.org/r/20210303084549.179346-1-zhang.yunkai@zte.com.cn
Signed-off-by: Zhang Yunkai <zhang.yunkai@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Change 'option defconfig' to the environment variable
KCONFIG_DEFCONFIG_LIST
- Refactor tinyconfig without using allnoconfig_y
- Remove 'option allnoconfig_y' syntax
- Change 'option modules' to 'modules'
- Do not use /boot/config-* etc. as base config for cross-compilation
- Fix a search bug in nconf
- Various code cleanups
-----BEGIN PGP SIGNATURE-----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=+eSh
-----END PGP SIGNATURE-----
Merge tag 'kconfig-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig updates from Masahiro Yamada:
- Change 'option defconfig' to the environment variable
KCONFIG_DEFCONFIG_LIST
- Refactor tinyconfig without using allnoconfig_y
- Remove 'option allnoconfig_y' syntax
- Change 'option modules' to 'modules'
- Do not use /boot/config-* etc. as base config for cross-compilation
- Fix a search bug in nconf
- Various code cleanups
* tag 'kconfig-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits)
kconfig: refactor .gitignore
kconfig: highlight xconfig 'comment' lines with '***'
kconfig: highlight gconfig 'comment' lines with '***'
kconfig: gconf: remove unused code
kconfig: remove unused PACKAGE definition
kconfig: nconf: stop endless search loops
kconfig: split menu.c out of parser.y
kconfig: nconf: refactor in print_in_middle()
kconfig: nconf: remove meaningless wattrset() call from show_menu()
kconfig: nconf: change set_config_filename() to void function
kconfig: nconf: refactor attributes setup code
kconfig: nconf: remove unneeded default for menu prompt
kconfig: nconf: get rid of (void) casts from wattrset() calls
kconfig: nconf: fix NORMAL attributes
kconfig: mconf,nconf: remove unneeded '\0' termination after snprintf()
kconfig: use /boot/config-* etc. as DEFCONFIG_LIST only for native build
kconfig: change sym_change_count to a boolean flag
kconfig: nconf: fix core dump when searching in empty menu
kconfig: lxdialog: A spello fix and a punctuation added
kconfig: streamline_config.pl: Couple of typo fixes
...
- Evaluate $(call cc-option,...) etc. only for build targets
- Add CONFIG_VMLINUX_MAP to generate .map file when linking vmlinux
- Remove unnecessary --gcc-toolchains Clang flag because the --prefix
flag finds the toolchains
- Do not pass Clang's --prefix flag when using the integrated as
- Check the assembler version in Kconfig time
- Add new CONFIG options, AS_VERSION, AS_IS_GNU, AS_IS_LLVM to clean up
some dependencies in Kconfig
- Fix invalid Module.symvers creation when building only modules without
vmlinux
- Fix false-positive modpost warnings when CONFIG_TRIM_UNUSED_KSYMS is
set, but there is no module to build
- Refactor module installation Makefile
- Support zstd for module compression
- Convert alpha and ia64 to use generic shell scripts to generate the
syscall headers
- Add a new elfnote to indicate if the kernel was built with LTO, which
will be used by pahole
- Flatten the directory structure under include/config/ so CONFIG options
and filenames match
- Change the deb source package name from linux-$(KERNELRELEASE) to
linux-upstream
-----BEGIN PGP SIGNATURE-----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=ti9L
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Evaluate $(call cc-option,...) etc. only for build targets
- Add CONFIG_VMLINUX_MAP to generate .map file when linking vmlinux
- Remove unnecessary --gcc-toolchains Clang flag because the --prefix
flag finds the toolchains
- Do not pass Clang's --prefix flag when using the integrated as
- Check the assembler version in Kconfig time
- Add new CONFIG options, AS_VERSION, AS_IS_GNU, AS_IS_LLVM to clean up
some dependencies in Kconfig
- Fix invalid Module.symvers creation when building only modules
without vmlinux
- Fix false-positive modpost warnings when CONFIG_TRIM_UNUSED_KSYMS is
set, but there is no module to build
- Refactor module installation Makefile
- Support zstd for module compression
- Convert alpha and ia64 to use generic shell scripts to generate the
syscall headers
- Add a new elfnote to indicate if the kernel was built with LTO, which
will be used by pahole
- Flatten the directory structure under include/config/ so CONFIG
options and filenames match
- Change the deb source package name from linux-$(KERNELRELEASE) to
linux-upstream
* tag 'kbuild-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (42 commits)
kbuild: Add $(KBUILD_HOSTLDFLAGS) to 'has_libelf' test
kbuild: deb-pkg: change the source package name to linux-upstream
tools: do not include scripts/Kbuild.include
kbuild: redo fake deps at include/config/*.h
kbuild: remove TMPO from try-run
MAINTAINERS: add pattern for dummy-tools
kbuild: add an elfnote for whether vmlinux is built with lto
ia64: syscalls: switch to generic syscallhdr.sh
ia64: syscalls: switch to generic syscalltbl.sh
alpha: syscalls: switch to generic syscallhdr.sh
alpha: syscalls: switch to generic syscalltbl.sh
sysctl: use min() helper for namecmp()
kbuild: add support for zstd compressed modules
kbuild: remove CONFIG_MODULE_COMPRESS
kbuild: merge scripts/Makefile.modsign to scripts/Makefile.modinst
kbuild: move module strip/compression code into scripts/Makefile.modinst
kbuild: refactor scripts/Makefile.modinst
kbuild: rename extmod-prefix to extmod_prefix
kbuild: check module name conflict for external modules as well
kbuild: show the target directory for depmod log
...
Core:
- bpf:
- allow bpf programs calling kernel functions (initially to
reuse TCP congestion control implementations)
- enable task local storage for tracing programs - remove the
need to store per-task state in hash maps, and allow tracing
programs access to task local storage previously added for
BPF_LSM
- add bpf_for_each_map_elem() helper, allowing programs to
walk all map elements in a more robust and easier to verify
fashion
- sockmap: support UDP and cross-protocol BPF_SK_SKB_VERDICT
redirection
- lpm: add support for batched ops in LPM trie
- add BTF_KIND_FLOAT support - mostly to allow use of BTF
on s390 which has floats in its headers files
- improve BPF syscall documentation and extend the use of kdoc
parsing scripts we already employ for bpf-helpers
- libbpf, bpftool: support static linking of BPF ELF files
- improve support for encapsulation of L2 packets
- xdp: restructure redirect actions to avoid a runtime lookup,
improving performance by 4-8% in microbenchmarks
- xsk: build skb by page (aka generic zerocopy xmit) - improve
performance of software AF_XDP path by 33% for devices
which don't need headers in the linear skb part (e.g. virtio)
- nexthop: resilient next-hop groups - improve path stability
on next-hops group changes (incl. offload for mlxsw)
- ipv6: segment routing: add support for IPv4 decapsulation
- icmp: add support for RFC 8335 extended PROBE messages
- inet: use bigger hash table for IP ID generation
- tcp: deal better with delayed TX completions - make sure we don't
give up on fast TCP retransmissions only because driver is
slow in reporting that it completed transmitting the original
- tcp: reorder tcp_congestion_ops for better cache locality
- mptcp:
- add sockopt support for common TCP options
- add support for common TCP msg flags
- include multiple address ids in RM_ADDR
- add reset option support for resetting one subflow
- udp: GRO L4 improvements - improve 'forward' / 'frag_list'
co-existence with UDP tunnel GRO, allowing the first to take
place correctly even for encapsulated UDP traffic
- micro-optimize dev_gro_receive() and flow dissection, avoid
retpoline overhead on VLAN and TEB GRO
- use less memory for sysctls, add a new sysctl type, to allow using
u8 instead of "int" and "long" and shrink networking sysctls
- veth: allow GRO without XDP - this allows aggregating UDP
packets before handing them off to routing, bridge, OvS, etc.
- allow specifing ifindex when device is moved to another namespace
- netfilter:
- nft_socket: add support for cgroupsv2
- nftables: add catch-all set element - special element used
to define a default action in case normal lookup missed
- use net_generic infra in many modules to avoid allocating
per-ns memory unnecessarily
- xps: improve the xps handling to avoid potential out-of-bound
accesses and use-after-free when XPS change race with other
re-configuration under traffic
- add a config knob to turn off per-cpu netdev refcnt to catch
underflows in testing
Device APIs:
- add WWAN subsystem to organize the WWAN interfaces better and
hopefully start driving towards more unified and vendor-
-independent APIs
- ethtool:
- add interface for reading IEEE MIB stats (incl. mlx5 and
bnxt support)
- allow network drivers to dump arbitrary SFP EEPROM data,
current offset+length API was a poor fit for modern SFP
which define EEPROM in terms of pages (incl. mlx5 support)
- act_police, flow_offload: add support for packet-per-second
policing (incl. offload for nfp)
- psample: add additional metadata attributes like transit delay
for packets sampled from switch HW (and corresponding egress
and policy-based sampling in the mlxsw driver)
- dsa: improve support for sandwiched LAGs with bridge and DSA
- netfilter:
- flowtable: use direct xmit in topologies with IP
forwarding, bridging, vlans etc.
- nftables: counter hardware offload support
- Bluetooth:
- improvements for firmware download w/ Intel devices
- add support for reading AOSP vendor capabilities
- add support for virtio transport driver
- mac80211:
- allow concurrent monitor iface and ethernet rx decap
- set priority and queue mapping for injected frames
- phy: add support for Clause-45 PHY Loopback
- pci/iov: add sysfs MSI-X vector assignment interface
to distribute MSI-X resources to VFs (incl. mlx5 support)
New hardware/drivers:
- dsa: mv88e6xxx: add support for Marvell mv88e6393x -
11-port Ethernet switch with 8x 1-Gigabit Ethernet
and 3x 10-Gigabit interfaces.
- dsa: support for legacy Broadcom tags used on BCM5325, BCM5365
and BCM63xx switches
- Microchip KSZ8863 and KSZ8873; 3x 10/100Mbps Ethernet switches
- ath11k: support for QCN9074 a 802.11ax device
- Bluetooth: Broadcom BCM4330 and BMC4334
- phy: Marvell 88X2222 transceiver support
- mdio: add BCM6368 MDIO mux bus controller
- r8152: support RTL8153 and RTL8156 (USB Ethernet) chips
- mana: driver for Microsoft Azure Network Adapter (MANA)
- Actions Semi Owl Ethernet MAC
- can: driver for ETAS ES58X CAN/USB interfaces
Pure driver changes:
- add XDP support to: enetc, igc, stmmac
- add AF_XDP support to: stmmac
- virtio:
- page_to_skb() use build_skb when there's sufficient tailroom
(21% improvement for 1000B UDP frames)
- support XDP even without dedicated Tx queues - share the Tx
queues with the stack when necessary
- mlx5:
- flow rules: add support for mirroring with conntrack,
matching on ICMP, GTP, flex filters and more
- support packet sampling with flow offloads
- persist uplink representor netdev across eswitch mode
changes
- allow coexistence of CQE compression and HW time-stamping
- add ethtool extended link error state reporting
- ice, iavf: support flow filters, UDP Segmentation Offload
- dpaa2-switch:
- move the driver out of staging
- add spanning tree (STP) support
- add rx copybreak support
- add tc flower hardware offload on ingress traffic
- ionic:
- implement Rx page reuse
- support HW PTP time-stamping
- octeon: support TC hardware offloads - flower matching on ingress
and egress ratelimitting.
- stmmac:
- add RX frame steering based on VLAN priority in tc flower
- support frame preemption (FPE)
- intel: add cross time-stamping freq difference adjustment
- ocelot:
- support forwarding of MRP frames in HW
- support multiple bridges
- support PTP Sync one-step timestamping
- dsa: mv88e6xxx, dpaa2-switch: offload bridge port flags like
learning, flooding etc.
- ipa: add IPA v4.5, v4.9 and v4.11 support (Qualcomm SDX55, SM8350,
SC7280 SoCs)
- mt7601u: enable TDLS support
- mt76:
- add support for 802.3 rx frames (mt7915/mt7615)
- mt7915 flash pre-calibration support
- mt7921/mt7663 runtime power management fixes
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=vcbA
-----END PGP SIGNATURE-----
Merge tag 'net-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core:
- bpf:
- allow bpf programs calling kernel functions (initially to
reuse TCP congestion control implementations)
- enable task local storage for tracing programs - remove the
need to store per-task state in hash maps, and allow tracing
programs access to task local storage previously added for
BPF_LSM
- add bpf_for_each_map_elem() helper, allowing programs to walk
all map elements in a more robust and easier to verify fashion
- sockmap: support UDP and cross-protocol BPF_SK_SKB_VERDICT
redirection
- lpm: add support for batched ops in LPM trie
- add BTF_KIND_FLOAT support - mostly to allow use of BTF on
s390 which has floats in its headers files
- improve BPF syscall documentation and extend the use of kdoc
parsing scripts we already employ for bpf-helpers
- libbpf, bpftool: support static linking of BPF ELF files
- improve support for encapsulation of L2 packets
- xdp: restructure redirect actions to avoid a runtime lookup,
improving performance by 4-8% in microbenchmarks
- xsk: build skb by page (aka generic zerocopy xmit) - improve
performance of software AF_XDP path by 33% for devices which don't
need headers in the linear skb part (e.g. virtio)
- nexthop: resilient next-hop groups - improve path stability on
next-hops group changes (incl. offload for mlxsw)
- ipv6: segment routing: add support for IPv4 decapsulation
- icmp: add support for RFC 8335 extended PROBE messages
- inet: use bigger hash table for IP ID generation
- tcp: deal better with delayed TX completions - make sure we don't
give up on fast TCP retransmissions only because driver is slow in
reporting that it completed transmitting the original
- tcp: reorder tcp_congestion_ops for better cache locality
- mptcp:
- add sockopt support for common TCP options
- add support for common TCP msg flags
- include multiple address ids in RM_ADDR
- add reset option support for resetting one subflow
- udp: GRO L4 improvements - improve 'forward' / 'frag_list'
co-existence with UDP tunnel GRO, allowing the first to take place
correctly even for encapsulated UDP traffic
- micro-optimize dev_gro_receive() and flow dissection, avoid
retpoline overhead on VLAN and TEB GRO
- use less memory for sysctls, add a new sysctl type, to allow using
u8 instead of "int" and "long" and shrink networking sysctls
- veth: allow GRO without XDP - this allows aggregating UDP packets
before handing them off to routing, bridge, OvS, etc.
- allow specifing ifindex when device is moved to another namespace
- netfilter:
- nft_socket: add support for cgroupsv2
- nftables: add catch-all set element - special element used to
define a default action in case normal lookup missed
- use net_generic infra in many modules to avoid allocating
per-ns memory unnecessarily
- xps: improve the xps handling to avoid potential out-of-bound
accesses and use-after-free when XPS change race with other
re-configuration under traffic
- add a config knob to turn off per-cpu netdev refcnt to catch
underflows in testing
Device APIs:
- add WWAN subsystem to organize the WWAN interfaces better and
hopefully start driving towards more unified and vendor-
independent APIs
- ethtool:
- add interface for reading IEEE MIB stats (incl. mlx5 and bnxt
support)
- allow network drivers to dump arbitrary SFP EEPROM data,
current offset+length API was a poor fit for modern SFP which
define EEPROM in terms of pages (incl. mlx5 support)
- act_police, flow_offload: add support for packet-per-second
policing (incl. offload for nfp)
- psample: add additional metadata attributes like transit delay for
packets sampled from switch HW (and corresponding egress and
policy-based sampling in the mlxsw driver)
- dsa: improve support for sandwiched LAGs with bridge and DSA
- netfilter:
- flowtable: use direct xmit in topologies with IP forwarding,
bridging, vlans etc.
- nftables: counter hardware offload support
- Bluetooth:
- improvements for firmware download w/ Intel devices
- add support for reading AOSP vendor capabilities
- add support for virtio transport driver
- mac80211:
- allow concurrent monitor iface and ethernet rx decap
- set priority and queue mapping for injected frames
- phy: add support for Clause-45 PHY Loopback
- pci/iov: add sysfs MSI-X vector assignment interface to distribute
MSI-X resources to VFs (incl. mlx5 support)
New hardware/drivers:
- dsa: mv88e6xxx: add support for Marvell mv88e6393x - 11-port
Ethernet switch with 8x 1-Gigabit Ethernet and 3x 10-Gigabit
interfaces.
- dsa: support for legacy Broadcom tags used on BCM5325, BCM5365 and
BCM63xx switches
- Microchip KSZ8863 and KSZ8873; 3x 10/100Mbps Ethernet switches
- ath11k: support for QCN9074 a 802.11ax device
- Bluetooth: Broadcom BCM4330 and BMC4334
- phy: Marvell 88X2222 transceiver support
- mdio: add BCM6368 MDIO mux bus controller
- r8152: support RTL8153 and RTL8156 (USB Ethernet) chips
- mana: driver for Microsoft Azure Network Adapter (MANA)
- Actions Semi Owl Ethernet MAC
- can: driver for ETAS ES58X CAN/USB interfaces
Pure driver changes:
- add XDP support to: enetc, igc, stmmac
- add AF_XDP support to: stmmac
- virtio:
- page_to_skb() use build_skb when there's sufficient tailroom
(21% improvement for 1000B UDP frames)
- support XDP even without dedicated Tx queues - share the Tx
queues with the stack when necessary
- mlx5:
- flow rules: add support for mirroring with conntrack, matching
on ICMP, GTP, flex filters and more
- support packet sampling with flow offloads
- persist uplink representor netdev across eswitch mode changes
- allow coexistence of CQE compression and HW time-stamping
- add ethtool extended link error state reporting
- ice, iavf: support flow filters, UDP Segmentation Offload
- dpaa2-switch:
- move the driver out of staging
- add spanning tree (STP) support
- add rx copybreak support
- add tc flower hardware offload on ingress traffic
- ionic:
- implement Rx page reuse
- support HW PTP time-stamping
- octeon: support TC hardware offloads - flower matching on ingress
and egress ratelimitting.
- stmmac:
- add RX frame steering based on VLAN priority in tc flower
- support frame preemption (FPE)
- intel: add cross time-stamping freq difference adjustment
- ocelot:
- support forwarding of MRP frames in HW
- support multiple bridges
- support PTP Sync one-step timestamping
- dsa: mv88e6xxx, dpaa2-switch: offload bridge port flags like
learning, flooding etc.
- ipa: add IPA v4.5, v4.9 and v4.11 support (Qualcomm SDX55, SM8350,
SC7280 SoCs)
- mt7601u: enable TDLS support
- mt76:
- add support for 802.3 rx frames (mt7915/mt7615)
- mt7915 flash pre-calibration support
- mt7921/mt7663 runtime power management fixes"
* tag 'net-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2451 commits)
net: selftest: fix build issue if INET is disabled
net: netrom: nr_in: Remove redundant assignment to ns
net: tun: Remove redundant assignment to ret
net: phy: marvell: add downshift support for M88E1240
net: dsa: ksz: Make reg_mib_cnt a u8 as it never exceeds 255
net/sched: act_ct: Remove redundant ct get and check
icmp: standardize naming of RFC 8335 PROBE constants
bpf, selftests: Update array map tests for per-cpu batched ops
bpf: Add batched ops support for percpu array
bpf: Implement formatted output helpers with bstr_printf
seq_file: Add a seq_bprintf function
sfc: adjust efx->xdp_tx_queue_count with the real number of initialized queues
net:nfc:digital: Fix a double free in digital_tg_recv_dep_req
net: fix a concurrency bug in l2tp_tunnel_register()
net/smc: Remove redundant assignment to rc
mpls: Remove redundant assignment to err
llc2: Remove redundant assignment to rc
net/tls: Remove redundant initialization of record
rds: Remove redundant assignment to nr_sig
dt-bindings: net: mdio-gpio: add compatible for microchip,mdio-smi0
...
- Implement concurrent TLB flushes, which overlaps the local TLB flush with the
remote TLB flush. In testing this improved sysbench performance measurably by
a couple of percentage points, especially if TLB-heavy security mitigations
are active.
- Further micro-optimizations to improve the performance of TLB flushes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=3Cyp
-----END PGP SIGNATURE-----
Merge tag 'x86-mm-2021-04-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 tlb updates from Ingo Molnar:
"The x86 MM changes in this cycle were:
- Implement concurrent TLB flushes, which overlaps the local TLB
flush with the remote TLB flush.
In testing this improved sysbench performance measurably by a
couple of percentage points, especially if TLB-heavy security
mitigations are active.
- Further micro-optimizations to improve the performance of TLB
flushes"
* tag 'x86-mm-2021-04-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
smp: Micro-optimize smp_call_function_many_cond()
smp: Inline on_each_cpu_cond() and on_each_cpu()
x86/mm/tlb: Remove unnecessary uses of the inline keyword
cpumask: Mark functions as pure
x86/mm/tlb: Do not make is_lazy dirty for no reason
x86/mm/tlb: Privatize cpu_tlbstate
x86/mm/tlb: Flush remote and local TLBs concurrently
x86/mm/tlb: Open-code on_each_cpu_cond_mask() for tlb_is_not_lazy()
x86/mm/tlb: Unify flush_tlb_func_local() and flush_tlb_func_remote()
smp: Run functions concurrently in smp_call_function_many_cond()
- Switch to generic syscall scripts
- Some small fixes
-----BEGIN PGP SIGNATURE-----
iF0EABECAB0WIQQbPNTMvXmYlBPRwx7KSWXLKUoMIQUCYIpg9AAKCRDKSWXLKUoM
IXMaAKCMAvlTOl/sq+44yyqmZafzeka1kQCeOJ64km/oN86kZlhs72oXV3Nevmg=
=VvZO
-----END PGP SIGNATURE-----
Merge tag 'microblaze-v5.13' of git://git.monstr.eu/linux-2.6-microblaze
Pull Microblaze updates from Michal Simek:
"No new features, just about cleaning up some code and moving to
generic syscall solution used by other architectures:
- Switch to generic syscall scripts
- Some small fixes"
* tag 'microblaze-v5.13' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: add 'fallthrough' to memcpy/memset/memmove
microblaze: Fix a typo
microblaze: tag highmem_setup() with __meminit
microblaze: syscalls: switch to generic syscallhdr.sh
microblaze: syscalls: switch to generic syscalltbl.sh
- removed broken/unmaintained MIPS KVM trap and emulate support
- added support for Loongson-2K1000
- fixes and cleanups
-----BEGIN PGP SIGNATURE-----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=w/c4
-----END PGP SIGNATURE-----
Merge tag 'mips_5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Pull MIPS updates from Thomas Bogendoerfer:
- removed get_fs/set_fs
- removed broken/unmaintained MIPS KVM trap and emulate support
- added support for Loongson-2K1000
- fixes and cleanups
* tag 'mips_5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (107 commits)
MIPS: BCM63XX: Use BUG_ON instead of condition followed by BUG.
MIPS: select ARCH_KEEP_MEMBLOCK unconditionally
mips: Do not include hi and lo in clobber list for R6
MIPS:DTS:Correct the license for Loongson-2K
MIPS:DTS:Fix label name and interrupt number of ohci for Loongson-2K
MIPS: Avoid handcoded DIVU in `__div64_32' altogether
lib/math/test_div64: Correct the spelling of "dividend"
lib/math/test_div64: Fix error message formatting
mips/bootinfo:correct some comments of fw_arg
MIPS: Avoid DIVU in `__div64_32' is result would be zero
MIPS: Reinstate platform `__div64_32' handler
div64: Correct inline documentation for `do_div'
lib/math: Add a `do_div' test module
MIPS: Makefile: Replace -pg with CC_FLAGS_FTRACE
MIPS: pci-legacy: revert "use generic pci_enable_resources"
MIPS: Loongson64: Add kexec/kdump support
MIPS: pci-legacy: use generic pci_enable_resources
MIPS: pci-legacy: remove busn_resource field
MIPS: pci-legacy: remove redundant info messages
MIPS: pci-legacy: stop using of_pci_range_to_resource
...
