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mirror of https://github.com/torvalds/linux.git synced 2024-12-14 23:25:54 +00:00
linux/arch/x86
Vitaly Kuznetsov a3b7424392 x86/hyperv: Clear vCPU banks between calls to avoid flushing unneeded vCPUs
hv_flush_pcpu_ex structures are not cleared between calls for performance
reasons (they're variable size up to PAGE_SIZE each) but we must clear
hv_vp_set.bank_contents part of it to avoid flushing unneeded vCPUs. The
rest of the structure is formed correctly.

To do the clearing in an efficient way stash the maximum possible vCPU
number (this may differ from Linux CPU id).

Reported-by: Jork Loeser <Jork.Loeser@microsoft.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: devel@linuxdriverproject.org
Link: http://lkml.kernel.org/r/20171006154854.18092-1-vkuznets@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-10 12:53:00 +02:00
..
boot Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-07 09:42:35 -07:00
configs Merge branch 'x86/urgent' into x86/asm, to pick up fixes 2017-08-10 13:14:15 +02:00
crypto crypto: x86/twofish - Fix RBP usage 2017-09-20 17:42:38 +08:00
entry x86/unwind: Use MSB for frame pointer encoding on 32-bit 2017-10-10 12:49:48 +02:00
events perf/x86/intel/uncore: Correct num_boxes for IIO and IRP 2017-09-25 12:43:56 +02:00
hyperv x86/hyperv: Clear vCPU banks between calls to avoid flushing unneeded vCPUs 2017-10-10 12:53:00 +02:00
ia32 x86/fpu: Rename fpu::fpstate_active to fpu::initialized 2017-09-26 09:43:36 +02:00
include x86/hyperv: Clear vCPU banks between calls to avoid flushing unneeded vCPUs 2017-10-10 12:53:00 +02:00
kernel x86/unwind: Disable unwinder warnings on 32-bit 2017-10-10 12:49:49 +02:00
kvm Mixed bugfixes. Perhaps the most interesting one is a latent bug 2017-09-29 12:18:55 -07:00
lib x86/boot: Add early cmdline parsing for options with arguments 2017-07-18 11:38:06 +02:00
math-emu x86/fpu: Rename fpu__activate_curr() to fpu__initialize() 2017-09-26 09:43:44 +02:00
mm Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-10-01 13:55:32 -07:00
net x86: bpf_jit: small optimization in emit_bpf_tail_call() 2017-08-31 11:57:37 -07:00
oprofile
pci dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
platform Merge branch 'i2c/for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-09-09 14:18:40 -07:00
power dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
purgatory kasan: do not sanitize kexec purgatory 2017-03-31 17:13:30 -07:00
ras x86/mce: Merge mce_amd_inj into mce-inject 2017-06-14 07:32:07 +02:00
realmode x86/boot/realmode: Check for memory encryption on the APs 2017-07-18 11:38:04 +02:00
tools
um um: remove a stray tab 2017-09-13 22:36:27 +02:00
video
xen xen: fixes for 4.14-rc3 2017-09-29 12:24:28 -07:00
.gitignore
Kbuild Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-07 09:25:15 -07:00
Kconfig libnvdimm for 4.14 2017-09-11 13:10:57 -07:00
Kconfig.cpu
Kconfig.debug Merge branch 'x86/asm' into locking/core 2017-08-18 10:29:54 +02:00
Makefile x86/build: Use cc-option to validate stack alignment parameter 2017-08-21 09:53:15 +02:00
Makefile_32.cpu kbuild: remove cc-option-align 2017-06-25 12:43:00 +09:00
Makefile.um