From 3892c4754c724a29cff51e12596948ed2600f1e3 Mon Sep 17 00:00:00 2001 From: Hillf Danton Date: Wed, 30 Nov 2011 15:11:33 +1100 Subject: [PATCH] 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 Reviewed-by: Andrea Arcangeli Cc: Mel Gorman Signed-off-by: Andrew Morton --- mm/compaction.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/compaction.c b/mm/compaction.c index 899d95638586..8f8a5525dcde 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); -- 2.39.5