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@xxxxxxxxxxx> Reviewed-by: Bob Liu <bob.liu@xxxxxxxxxx> Cc: Minchan Kim <minchan@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Acked-by: Seth Jennings <sjenning@xxxxxxxxxxxxxxxxxx> --- mm/zswap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/zswap.c b/mm/zswap.c index 1be7b90..cc40e6a 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); -- 1.7.10.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>