Currently it's calculated once per zone in the zonelist.
Signed-off-by: Mel Gorman <mgor...@suse.de>
Acked-by: Johannes Weiner <han...@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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