From: Joonsoo Kim Date: Thu, 19 Dec 2013 01:08:52 +0000 (-0800) Subject: mm/compaction: respect ignore_skip_hint in update_pageblock_skip X-Git-Tag: firefly_0821_release~3679^2~3180 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=31eb5f24b9a0aeb058bef453c14328fb29e63501;p=firefly-linux-kernel-4.4.55.git mm/compaction: respect ignore_skip_hint in update_pageblock_skip commit 6815bf3f233e0b10c99a758497d5d236063b010b upstream. update_pageblock_skip() only fits to compaction which tries to isolate by pageblock unit. If isolate_migratepages_range() is called by CMA, it try to isolate regardless of pageblock unit and it don't reference get_pageblock_skip() by ignore_skip_hint. We should also respect it on update_pageblock_skip() to prevent from setting the wrong information. Signed-off-by: Joonsoo Kim Acked-by: Vlastimil Babka Reviewed-by: Naoya Horiguchi Reviewed-by: Wanpeng Li Cc: Christoph Lameter Cc: Rafael Aquini Cc: Vlastimil Babka Cc: Wanpeng Li Cc: Mel Gorman Cc: Rik van Riel Cc: Zhang Yanfei Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- diff --git a/mm/compaction.c b/mm/compaction.c index 05ccb4cc0bdb..9a3e351da29b 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -134,6 +134,10 @@ static void update_pageblock_skip(struct compact_control *cc, bool migrate_scanner) { struct zone *zone = cc->zone; + + if (cc->ignore_skip_hint) + return; + if (!page) return;