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authorMel Gorman <mgorman@suse.de>2013-07-03 15:02:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:07:29 -0700
commitf7ab8db791a8692f5ed4201dbae25722c1732a8d (patch)
tree8d868083d8f111ff2268f6f57c116b0b1866dcb5
parentb1a6f21e3b2315d46ae8af88a8f4eb8ea2763107 (diff)
mm: vmscan: set zone flags before blocking
In shrink_page_list a decision may be made to stall and flag a zone as ZONE_WRITEBACK so that if a large number of unqueued dirty pages are encountered later then the reclaimer will stall. Set ZONE_WRITEBACK before potentially going to sleep so it is noticed sooner. Signed-off-by: Mel Gorman <mgorman@suse.de> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Rik van Riel <riel@redhat.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu> Cc: Zlatko Calusic <zcalusic@bitsync.net> Cc: dormando <dormando@rydia.net> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/vmscan.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 5b1a79c8f0cb..5f80d018bffa 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1445,8 +1445,8 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
*/
if (nr_writeback && nr_writeback >=
(nr_taken >> (DEF_PRIORITY - sc->priority))) {
- wait_iff_congested(zone, BLK_RW_ASYNC, HZ/10);
zone_set_flag(zone, ZONE_WRITEBACK);
+ wait_iff_congested(zone, BLK_RW_ASYNC, HZ/10);
}
/*