From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
There are currently three paths through the remote flush code:
1. full invalidation
2. single page invalidation using invlpg
3. ranged invalidation using invlpg
This takes 2 and 3 and combines them in to a single path by
making the single-page one just be the start and end be start
plus a single page. This makes placement of our tracepoint easier.
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
---
b/arch/x86/mm/tlb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN arch/x86/mm/tlb.c~x86-tlb-simplify-remote-flush-code arch/x86/mm/tlb.c
--- a/arch/x86/mm/tlb.c~x86-tlb-simplify-remote-flush-code 2014-06-30 16:18:28.009559635 -0700
+++ b/arch/x86/mm/tlb.c 2014-06-30 16:18:28.013559817 -0700
@@ -102,13 +102,13 @@ static void flush_tlb_func(void *info)
if (f->flush_mm != this_cpu_read(cpu_tlbstate.active_mm))
return;
+ if (!f->flush_end)
+ f->flush_end = f->flush_start + PAGE_SIZE;
count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED);
if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK) {
if (f->flush_end == TLB_FLUSH_ALL)
local_flush_tlb();
- else if (!f->flush_end)
- __flush_tlb_single(f->flush_start);
else {
unsigned long addr;
addr = f->flush_start;
_
--
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