From ad27398b818479461b9901c815a331ddd0b34000 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Fri, 28 Sep 2012 10:19:48 +1000 Subject: [PATCH] mm: compaction: cache if a pageblock was scanned and no pages were isolated -fix2 The clearing of PG_migrate_skip potentially takes a long time if the zone is massive. Be safe and check if it needs to reschedule. This is a fix for mm-compaction-cache-if-a-pageblock-was-scanned-and-no-pages-were-isolated.patch Signed-off-by: Mel Gorman Signed-off-by: Andrew Morton --- mm/compaction.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/compaction.c b/mm/compaction.c index e54027411a6c..f7a5ff5af9f5 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -85,6 +85,9 @@ static void reset_isolation_suitable(struct zone *zone) /* Walk the zone and mark every pageblock as suitable for isolation */ for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) { struct page *page; + + cond_resched(); + if (!pfn_valid(pfn)) continue; -- 2.39.2