If the migrate target is a large free page and we ignore suitable, it may not good for defrag. So move the ignore block suitable after check large free page. Signed-off-by: Yisheng Xie <xieyisheng1@xxxxxxxxxx> --- mm/compaction.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/compaction.c b/mm/compaction.c index 0fdfde0..4bf2a5d 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -991,9 +991,6 @@ static bool too_many_isolated(struct zone *zone) static bool suitable_migration_target(struct compact_control *cc, struct page *page) { - if (cc->ignore_block_suitable) - return true; - /* If the page is a large free page, then disallow migration */ if (PageBuddy(page)) { /* @@ -1005,6 +1002,9 @@ static bool suitable_migration_target(struct compact_control *cc, return false; } + if (cc->ignore_block_suitable) + return true; + /* If the block is MIGRATE_MOVABLE or MIGRATE_CMA, allow migration */ if (migrate_async_suitable(get_pageblock_migratetype(page))) return true; -- 1.7.12.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>