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@xxxxxxx>
---
mm/vmscan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 5b1a79c..5f80d01 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);
}
/*
--
1.8.1.4
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