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x86/mm: Unify remote INVLPG code

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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@linux.intel.com>
Link: http://lkml.kernel.org/r/20140731154058.E0F90408@viggo.jf.intel.com
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Dave Hansen 2014-07-31 08:40:58 -07:00 committed by H. Peter Anvin
parent 9dfa6dee53
commit a23421f111
1 changed files with 2 additions and 2 deletions
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4
arch/x86/mm/tlb.c
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@ -102,13 +102,13 @@ static void flush_tlb_func(void *info)
if (f->flush_mm != this_cpu_read(cpu_tlbstate.active_mm)) if (f->flush_mm != this_cpu_read(cpu_tlbstate.active_mm))
return; return;
if (!f->flush_end)
f->flush_end = f->flush_start + PAGE_SIZE;
count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED); count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED);
if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK) { if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK) {
if (f->flush_end == TLB_FLUSH_ALL) if (f->flush_end == TLB_FLUSH_ALL)
local_flush_tlb(); local_flush_tlb();
else if (!f->flush_end)
__flush_tlb_single(f->flush_start);
else { else {
unsigned long addr; unsigned long addr;
addr = f->flush_start; addr = f->flush_start;