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authorDave Hansen <dave@sr71.net>2013-09-11 14:20:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-11 15:57:09 -0700
commit6df46865ff8715932e7d42e52cac17e8461758cb (patch)
tree7c7e1d43b22a2bec2d4a6fce95ddc3cbd481aa1e /arch/x86/mm
parent9824cf9753ecbe8f5b47aa9b2f218207defea211 (diff)
mm: vmstats: track TLB flush stats on UP too
The previous patch doing vmstats for TLB flushes ("mm: vmstats: tlb flush counters") effectively missed UP since arch/x86/mm/tlb.c is only compiled for SMP. UP systems do not do remote TLB flushes, so compile those counters out on UP. arch/x86/kernel/cpu/mtrr/generic.c calls __flush_tlb() directly. This is probably an optimization since both the mtrr code and __flush_tlb() write cr4. It would probably be safe to make that a flush_tlb_all() (and then get these statistics), but the mtrr code is ancient and I'm hesitant to touch it other than to just stick in the counters. [akpm@linux-foundation.org: tweak comments] Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.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>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/tlb.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index f030cbe669a5..ae699b3bbac8 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -280,10 +280,8 @@ static void do_kernel_range_flush(void *info)
unsigned long addr;
/* flush range by one by one 'invlpg' */
- for (addr = f->flush_start; addr < f->flush_end; addr += PAGE_SIZE) {
- count_vm_event(NR_TLB_LOCAL_FLUSH_ONE_KERNEL);
+ for (addr = f->flush_start; addr < f->flush_end; addr += PAGE_SIZE)
__flush_tlb_single(addr);
- }
}
void flush_tlb_kernel_range(unsigned long start, unsigned long end)