Messages in this thread Patch in this message | | | From | Mel Gorman <> | Subject | [PATCH 06/17] mm: page_alloc: Only check the alloc flags and gfp_mask for dirty once | Date | Thu, 1 May 2014 09:44:37 +0100 |
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Currently it's calculated once per zone in the zonelist.
Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: Johannes Weiner <hannes@cmpxchg.org> --- mm/page_alloc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8971953..2e576fd 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1925,6 +1925,8 @@ get_page_from_freelist(gfp_t gfp_mask, nodemask_t *nodemask, unsigned int order, nodemask_t *allowednodes = NULL;/* zonelist_cache approximation */ int zlc_active = 0; /* set if using zonelist_cache */ int did_zlc_setup = 0; /* just call zlc_setup() one time */ + bool consider_zone_dirty = (alloc_flags & ALLOC_WMARK_LOW) && + (gfp_mask & __GFP_WRITE); zonelist_scan: /* @@ -1983,8 +1985,7 @@ zonelist_scan: * will require awareness of zones in the * dirty-throttling and the flusher threads. */ - if ((alloc_flags & ALLOC_WMARK_LOW) && - (gfp_mask & __GFP_WRITE) && !zone_dirty_ok(zone)) + if (consider_zone_dirty && !zone_dirty_ok(zone)) continue; mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK]; -- 1.8.4.5
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