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@xxxxxxxxx>
---
--- a/mm/compaction.c Thu Nov 24 20:23:28 2011
+++ b/mm/compaction.c Thu Nov 24 20:32:41 2011
@@ -365,8 +365,10 @@ static isolate_migrate_t isolate_migrate
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);
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