From fd0f5869724ff6195c6e7f12f8287c66a132e0ba Mon Sep 17 00:00:00 2001 From: Tomoki Sekiyama Date: Wed, 26 Sep 2012 11:11:28 +0900 Subject: 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 Link: http://lkml.kernel.org/r/20120926021128.22212.20440.stgit@hpxw Acked-by: Alex Shi Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/hardirq.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/x86/include/asm/hardirq.h') diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h index d3895dbf4ddb..81f04cee5f74 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 -- cgit v1.2.3