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authorWeijie Yang <weijie.yang@samsung.com>2013-11-12 15:07:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 12:09:08 +0900
commitb349acc76b7f65400b85abd09a5379ddd6fa5a97 (patch)
treee21180e37fd7a9af677f4dafdeec0754a9e7bf5b /mm/zswap.c
parentc4a391b53a72d2df4ee97f96f78c1d5971b47489 (diff)
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op-kernel-dev-b349acc76b7f65400b85abd09a5379ddd6fa5a97.tar.gz
mm/zswap: avoid unnecessary page scanning
Add SetPageReclaim() before __swap_writepage() so that page can be moved to the tail of the inactive list, which can avoid unnecessary page scanning as this page was reclaimed by swap subsystem before. Signed-off-by: Weijie Yang <weijie.yang@samsung.com> Reviewed-by: Bob Liu <bob.liu@oracle.com> Reviewed-by: Minchan Kim <minchan@kernel.org> Acked-by: Seth Jennings <sjenning@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/zswap.c')
-rw-r--r--mm/zswap.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/zswap.c b/mm/zswap.c
index d93510c..001474c 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -556,6 +556,9 @@ static int zswap_writeback_entry(struct zbud_pool *pool, unsigned long handle)
SetPageUptodate(page);
}
+ /* move it to the tail of the inactive list after end_writeback */
+ SetPageReclaim(page);
+
/* start writeback */
__swap_writepage(page, &wbc, end_swap_bio_write);
page_cache_release(page);
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