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mm: compaction: push isolate search base of compact control one pfn ahead

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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>
This commit is contained in:
Hillf Danton 2012-01-10 15:07:59 -08:00 committed by Linus Torvalds
parent e3a41a5ba9
commit 31b8384a55
1 changed files with 3 additions and 1 deletions
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4
mm/compaction.c
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@ -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);