The patch titled
Subject: mm/compaction.c: clear total_{migrate,free}_scanned before scanning a new zone
has been added to the -mm tree. Its filename is
mm-compaction-clear-total_migratefree_scanned-before-scanning-a-new-zone.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-compaction-clear-total_migratefree_scanned-before-scanning-a-new-zone.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-compaction-clear-total_migratefree_scanned-before-scanning-a-new-zone.patch
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------------------------------------------------------
From: Yafang Shao <laoar.shao@xxxxxxxxx>
Subject: mm/compaction.c: clear total_{migrate,free}_scanned before scanning a new zone
total_{migrate,free}_scanned will be added to COMPACTMIGRATE_SCANNED and
COMPACTFREE_SCANNED in compact_zone(). We should clear them before
scanning a new zone. In the proc triggered compaction, we forgot clearing
them.
Link: http://lkml.kernel.org/r/1563789275-9639-1-git-send-email-laoar.shao@xxxxxxxxx
Fixes: 7f354a548d1c ("mm, compaction: add vmstats for kcompactd work")
Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Yafang Shao <shaoyafang@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/compaction.c~mm-compaction-clear-total_migratefree_scanned-before-scanning-a-new-zone
+++ a/mm/compaction.c
@@ -2408,8 +2408,6 @@ static void compact_node(int nid)
struct zone *zone;
struct compact_control cc = {
.order = -1,
- .total_migrate_scanned = 0,
- .total_free_scanned = 0,
.mode = MIGRATE_SYNC,
.ignore_skip_hint = true,
.whole_zone = true,
@@ -2425,6 +2423,8 @@ static void compact_node(int nid)
cc.nr_freepages = 0;
cc.nr_migratepages = 0;
+ cc.total_migrate_scanned = 0;
+ cc.total_free_scanned = 0;
cc.zone = zone;
INIT_LIST_HEAD(&cc.freepages);
INIT_LIST_HEAD(&cc.migratepages);
_
Patches currently in -mm which might be from laoar.shao@xxxxxxxxx are
mm-vmscan-expose-cgroup_ino-for-memcg-reclaim-tracepoints.patch
mm-compaction-clear-total_migratefree_scanned-before-scanning-a-new-zone.patch
