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| author | Mel Gorman <mgorman@suse.de> | 2013-07-08 16:00:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-09 10:33:23 -0700 |
| commit | 5a1c9cbc1550f93335d7c03eb6c271e642deff04 (patch) | |
| tree | fcb1a125a410a68807aa02e317d0717e65d7abd4 /mm/vmscan.c | |
| parent | 7e9f5eb03d3762ec89dda1888c774ae7b4040af7 (diff) | |
| download | lwn-5a1c9cbc1550f93335d7c03eb6c271e642deff04.tar.gz lwn-5a1c9cbc1550f93335d7c03eb6c271e642deff04.zip | |
mm: vmscan: do not continue scanning if reclaim was aborted for compaction
Direct reclaim is not aborting to allow compaction to go ahead properly.
do_try_to_free_pages is told to abort reclaim which is happily ignores
and instead increases priority instead until it reaches 0 and starts
shrinking file/anon equally. This patch corrects the situation by
aborting reclaim when requested instead of raising priority.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 99b3ac7771ad..2385663ae5e5 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2361,8 +2361,10 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, aborted_reclaim = shrink_zones(zonelist, sc); /* - * Don't shrink slabs when reclaiming memory from - * over limit cgroups + * Don't shrink slabs when reclaiming memory from over limit + * cgroups but do shrink slab at least once when aborting + * reclaim for compaction to avoid unevenly scanning file/anon + * LRU pages over slab pages. */ if (global_reclaim(sc)) { unsigned long lru_pages = 0; @@ -2404,7 +2406,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, WB_REASON_TRY_TO_FREE_PAGES); sc->may_writepage = 1; } - } while (--sc->priority >= 0); + } while (--sc->priority >= 0 && !aborted_reclaim); out: delayacct_freepages_end(); |