The patch titled
Subject: mm: vmscan: fix misused nr_reclaimed in shrink_mem_cgroup_zone()
has been added to the -mm tree. Its filename is
mm-vmscan-fix-misused-nr_reclaimed-in-shrink_mem_cgroup_zone.patch
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From: Hillf Danton <dhillf@xxxxxxxxx>
Subject: mm: vmscan: fix misused nr_reclaimed in shrink_mem_cgroup_zone()
The value of nr_reclaimed is the number of pages reclaimed in the current
round of the loop, whereas nr_to_reclaim should be compared with the
number of pages reclaimed in all rounds.
In each round of the loop, reclaimed pages are cut off from the reclaim
goal, and the loop stops once the goal achieved.
Signed-off-by: Hillf Danton <dhillf@xxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff -puN mm/vmscan.c~mm-vmscan-fix-misused-nr_reclaimed-in-shrink_mem_cgroup_zone mm/vmscan.c
--- a/mm/vmscan.c~mm-vmscan-fix-misused-nr_reclaimed-in-shrink_mem_cgroup_zone
+++ a/mm/vmscan.c
@@ -2112,7 +2112,12 @@ restart:
* with multiple processes reclaiming pages, the total
* freeing target can get unreasonably large.
*/
- if (nr_reclaimed >= nr_to_reclaim && priority < DEF_PRIORITY)
+ if (nr_reclaimed >= nr_to_reclaim)
+ nr_to_reclaim = 0;
+ else
+ nr_to_reclaim -= nr_reclaimed;
+
+ if (!nr_to_reclaim && priority < DEF_PRIORITY)
break;
}
blk_finish_plug(&plug);
_
Subject: Subject: mm: vmscan: fix misused nr_reclaimed in shrink_mem_cgroup_zone()
Patches currently in -mm which might be from dhillf@xxxxxxxxx are
origin.patch
mm-vmscanc-cleanup-with-s-reclaim_mode-isolate_mode.patch
mm-vmscan-fix-misused-nr_reclaimed-in-shrink_mem_cgroup_zone.patch
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