The patch titled
Subject: mm: decrease tlb flush pending count in tlb_finish_mmu
has been added to the -mm tree. Its filename is
mm-fix-madv_-tlb-flush-miss-problem-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-fix-madv_-tlb-flush-miss-problem-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-fix-madv_-tlb-flush-miss-problem-fix.patch
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------------------------------------------------------
From: Minchan Kim <minchan@xxxxxxxxxx>
Subject: mm: decrease tlb flush pending count in tlb_finish_mmu
The tlb pending count increased by tlb_gather_mmu should be decreased at
tlb_finish_mmu. Otherwise, A lot of TLB happens which makes performance
regression.
Link: http://lkml.kernel.org/r/20170808080821.GA31730@bbox
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Nadav Amit <nadav.amit@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/memory.c~mm-fix-madv_-tlb-flush-miss-problem-fix mm/memory.c
--- a/mm/memory.c~mm-fix-madv_-tlb-flush-miss-problem-fix
+++ a/mm/memory.c
@@ -423,6 +423,7 @@ void tlb_finish_mmu(struct mmu_gather *t
bool force = mm_tlb_flush_nested(tlb->mm);
arch_tlb_finish_mmu(tlb, start, end, force);
+ dec_tlb_flush_pending(tlb->mm);
}
/*
_
Patches currently in -mm which might be from minchan@xxxxxxxxxx are
mm-refactoring-tlb-gathering-api.patch
mm-make-tlb_flush_pending-global.patch
mm-fix-madv_-tlb-flush-miss-problem.patch
mm-fix-madv_-tlb-flush-miss-problem-fix.patch
mm-fix-ksm-data-corruption.patch
zram-clean-up-duplicated-codes-in-__zram_bvec_write.patch
zram-inlining-zram_compress.patch
zram-rename-zram_decompress_page-with-__zram_bvec_read.patch
zram-add-interface-to-specify-backing-device.patch
zram-add-free-space-management-in-backing-device.patch
zram-identify-asynchronous-ios-return-value.patch
zram-write-incompressible-pages-to-backing-device.patch
zram-read-page-from-backing-device.patch
zram-add-config-and-doc-file-for-writeback-feature.patch
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