From f7b5d647946aae1647bf5cd26c16b3a793c1ac49 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Wed, 6 Aug 2014 16:07:20 -0700 Subject: [PATCH] mm: page_alloc: abort fair zone allocation policy when remotes nodes are encountered The purpose of numa_zonelist_order=zone is to preserve lower zones for use with 32-bit devices. If locality is preferred then the numa_zonelist_order=node policy should be used. Unfortunately, the fair zone allocation policy overrides this by skipping zones on remote nodes until the lower one is found. While this makes sense from a page aging and performance perspective, it breaks the expected zonelist policy. This patch restores the expected behaviour for zone-list ordering. Signed-off-by: Mel Gorman Acked-by: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index daa0160..6e5e8f7 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1965,7 +1965,7 @@ zonelist_scan: */ if (alloc_flags & ALLOC_FAIR) { if (!zone_local(preferred_zone, zone)) - continue; + break; if (zone_page_state(zone, NR_ALLOC_BATCH) <= 0) continue; } -- 2.7.4