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| author | Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com> | 2012-09-26 11:11:28 +0900 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-09-27 22:52:34 -0700 |
| commit | fd0f5869724ff6195c6e7f12f8287c66a132e0ba (patch) | |
| tree | c6cab9cd8acd8ad644e53bea2aa2a439b53688a9 /arch/x86/include/asm/hardirq.h | |
| parent | d4c9dbc61fe0ca042b835c6f234af12fa5f18310 (diff) | |
| download | linux-0-day-fd0f5869724ff6195c6e7f12f8287c66a132e0ba.tar.gz linux-0-day-fd0f5869724ff6195c6e7f12f8287c66a132e0ba.tar.xz | |
x86: Distinguish TLB shootdown interrupts from other functions call interrupts
As TLB shootdown requests to other CPU cores are now using function call
interrupts, TLB shootdowns entry in /proc/interrupts is always shown as 0.
This behavior change was introduced by commit 52aec3308db8 ("x86/tlb:
replace INVALIDATE_TLB_VECTOR by CALL_FUNCTION_VECTOR").
This patch reverts TLB shootdowns entry in /proc/interrupts to count TLB
shootdowns separately from the other function call interrupts.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com>
Link: http://lkml.kernel.org/r/20120926021128.22212.20440.stgit@hpxw
Acked-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/hardirq.h')
| -rw-r--r-- | arch/x86/include/asm/hardirq.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h index d3895dbf4ddb5..81f04cee5f741 100644 --- a/arch/x86/include/asm/hardirq.h +++ b/arch/x86/include/asm/hardirq.h @@ -18,6 +18,10 @@ typedef struct { #ifdef CONFIG_SMP unsigned int irq_resched_count; unsigned int irq_call_count; + /* + * irq_tlb_count is double-counted in irq_call_count, so it must be + * subtracted from irq_call_count when displaying irq_call_count + */ unsigned int irq_tlb_count; #endif #ifdef CONFIG_X86_THERMAL_VECTOR |