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authorHillf Danton <dhillf@gmail.com>2012-01-10 15:07:59 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-10 16:30:44 -0800
commit31b8384a555d94c78e2ea2284a323cb985441f60 (patch)
tree6e9b3fc9d14e7bbd8c6c97a1277fd3e9b5034f5b /mm/compaction.c
parente3a41a5ba9c2ab988b9f1442925109dca2382fd9 (diff)
mm: compaction: push isolate search base of compact control one pfn ahead
After isolated the current pfn will no longer be scanned and isolated if the next round is necessary, so push the isolate_migratepages search base of the given compact_control one step ahead. Signed-off-by: Hillf Danton <dhillf@gmail.com> Reviewed-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Mel Gorman <mgorman@suse.de> 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.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 1253d7ac332..e6670c34eb4 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -365,8 +365,10 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
nr_isolated++;
/* Avoid isolating too much */
- if (cc->nr_migratepages == COMPACT_CLUSTER_MAX)
+ if (cc->nr_migratepages == COMPACT_CLUSTER_MAX) {
+ ++low_pfn;
break;
+ }
}
acct_isolated(zone, cc);