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authorMinchan Kim <minchan@kernel.org>2012-08-21 16:16:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-21 16:45:03 -0700
commitc81758fbe0fdbbc0c74b37798f55bd9c91d5c068 (patch)
tree5f25b6a2220c5e358e278681d6edc734b87288c3 /mm/compaction.c
parent7838f994b4fceff24c343f4e26a6cf4393869579 (diff)
downloadlinux-c81758fbe0fdbbc0c74b37798f55bd9c91d5c068.tar.gz
mm/compaction.c: fix deferring compaction mistake
Commit aff622495c9a ("vmscan: only defer compaction for failed order and higher") fixed bad deferring policy but made mistake about checking compact_order_failed in __compact_pgdat(). So it can't update compact_order_failed with the new order. This ends up preventing correct operation of policy deferral. This patch fixes it. Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Rik van Riel <riel@redhat.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/compaction.c')
-rw-r--r--mm/compaction.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index e78cb968842..b6984e234fd 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -861,7 +861,7 @@ static int __compact_pgdat(pg_data_t *pgdat, struct compact_control *cc)
if (cc->order > 0) {
int ok = zone_watermark_ok(zone, cc->order,
low_wmark_pages(zone), 0, 0);
- if (ok && cc->order > zone->compact_order_failed)
+ if (ok && cc->order >= zone->compact_order_failed)
zone->compact_order_failed = cc->order + 1;
/* Currently async compaction is never deferred. */
else if (!ok && cc->sync)