[PATCH 02/19] mm: page_alloc: Do not treat a zone that cannot be used for dirty pages as "full"

[Mel Gorman]

If a zone cannot be used for a dirty page then it gets marked "full"
which is cached in the zlc and later potentially skipped by allocation
requests that have nothing to do with dirty zones.

Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
---
 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 f8b80c3..5c559e3 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1976,7 +1976,7 @@ zonelist_scan:
 		 */
 		if ((alloc_flags & ALLOC_WMARK_LOW) &&
 		    (gfp_mask & __GFP_WRITE) && !zone_dirty_ok(zone))
-			goto this_zone_full;
+			continue;
 
 		mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
 		if (!zone_watermark_ok(zone, order, mark,
-- 
1.8.4.5

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