diff options
| -rw-r--r-- | mm/compaction.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/mm/compaction.c b/mm/compaction.c index 7ca6842c665d..c4bc5acf865d 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -337,8 +337,17 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone, continue; nr_scanned++; - /* Get the page and skip if free */ + /* + * Get the page and ensure the page is within the same zone. + * See the comment in isolate_freepages about overlapping + * nodes. It is deliberate that the new zone lock is not taken + * as memory compaction should not move pages between nodes. + */ page = pfn_to_page(low_pfn); + if (page_zone(page) != zone) + continue; + + /* Skip if free */ if (PageBuddy(page)) continue; |