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@xxxxxxx>
---
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;
--
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