[RFC v2 3/3] mm: deactivate lazyfree pages

From: Minchan Kim
Date: Thu Mar 20 2014 - 02:39:58 EST

MADV_FREEed pages should be discarded before working set pages
are reclaimed because most of users(ex, tcmalloc and jemalloc)
have used it instead of MADV_DONTNEED which zap pages instantly.

Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
mm/memory.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/mm/memory.c b/mm/memory.c
index 6f221225f62b..76b683e7d087 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1298,6 +1298,7 @@ static unsigned long lazyfree_pte_range(struct mmu_gather *tlb,
ptent = pte_mkclean(ptent);
set_pte_at(mm, addr, pte, ptent);
tlb_remove_tlb_entry(tlb, pte, addr);
+ deactivate_page(page);
} while (pte++, addr += PAGE_SIZE, addr != end);
pte_unmap_unlock(start_pte, ptl);

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