Messages in this thread Patch in this message | | | Date | Thu, 27 Sep 2012 13:06:21 +0100 | From | Mel Gorman <> | 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 <mgorman@suse.de> --- mm/compaction.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/mm/compaction.c b/mm/compaction.c index fb07abb..722d10f 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;
| |