Messages in this thread Patch in this message | | | From | Mel Gorman <> | Subject | [PATCH 5/6] mm: page_alloc: Abort fair zone allocation policy when remotes nodes are encountered | Date | Wed, 9 Jul 2014 09:13:07 +0100 |
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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 <mgorman@suse.de> --- 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 aa46f00..0bf384a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1957,7 +1957,7 @@ 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; } -- 1.8.4.5
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