add SetPageReclaim before __swap_writepage, so that page can be moved
to the tail of the inactive list,
which will avoid unnecessary page scanning as this page was reclaimed
by swap subsystem before.
---
mm/zswap.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/mm/zswap.c b/mm/zswap.c
index 9d34c3c..67a2e38 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);
--
1.7.0.4