--- a/mm/compaction.c~mm-compactionc-clean-code-by-removing-unnecessary-assignment +++ a/mm/compaction.c @@ -2182,7 +2182,6 @@ compact_zone(struct compact_control *cc, ret = COMPACT_CONTENDED; putback_movable_pages(&cc->migratepages); cc->nr_migratepages = 0; - last_migrated_pfn = 0; goto out; case ISOLATE_NONE: if (update_cached) {