Commit 800a1e75 authored by Mel Gorman's avatar Mel Gorman Committed by Linus Torvalds

mm: page_alloc: do not treat a zone that cannot be used for dirty pages as "full"

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: default avatarMel Gorman <>
Acked-by: default avatarJohannes Weiner <>
Reviewed-by: default avatarRik van Riel <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 65bb3719
......@@ -1967,7 +1967,7 @@ zonelist_scan:
if ((alloc_flags & ALLOC_WMARK_LOW) &&
(gfp_mask & __GFP_WRITE) && !zone_dirty_ok(zone))
goto this_zone_full;
mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
if (!zone_watermark_ok(zone, order, mark,
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