On Fri, Oct 25, 2013 at 02:09:35PM -0400, kosaki.motohiro@xxxxxxxxx wrote: > From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> > > Currently, set_pageblock_migratetype screw up MIGRATE_CMA and > MIGRATE_ISOLATE if page_group_by_mobility_disabled is true. It > rewrite the argument to MIGRATE_UNMOVABLE and we lost these attribute. > > The problem was introduced commit 49255c619f (page allocator: move > check for disabled anti-fragmentation out of fastpath). So, 4 years > lived issue may mean that nobody uses page_group_by_mobility_disabled. > Nobody uses page_group_by_mobility_disabled with CMA at least. page_group_by_mobility_disabled only kicks in automatically for small machines so it's possible the condition is very rarely encountered. Anyway Acked-by: Mel Gorman <mgorman@xxxxxxx> -- Mel Gorman SUSE Labs -- 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>