When enter page_alloc slowpath, we wakeup kswapd on every pgdat
according to the zonelist and high_zoneidx. However, this doesn't
take nodemask into account, and could prematurely wakeup kswapd on
some unintended nodes.
This patch uses for_each_zone_zonelist_nodemask() instead of
for_each_zone_zonelist() in wake_all_kswapds() to avoid the above situation.
Signed-off-by: Weijie Yang <weijie.yang@xxxxxxxxxxx>
---
mm/page_alloc.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 18cee0d..29b595a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2457,12 +2457,14 @@ __alloc_pages_high_priority(gfp_t gfp_mask, unsigned int order,
static void wake_all_kswapds(unsigned int order,
struct zonelist *zonelist,
enum zone_type high_zoneidx,
- struct zone *preferred_zone)
+ struct zone *preferred_zone,
+ nodemask_t *nodemask)
{
struct zoneref *z;
struct zone *zone;
- for_each_zone_zonelist(zone, z, zonelist, high_zoneidx)
+ for_each_zone_zonelist_nodemask(zone, z, zonelist,
+ high_zoneidx, nodemask)
wakeup_kswapd(zone, order, zone_idx(preferred_zone));
}
@@ -2560,7 +2562,8 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
restart:
if (!(gfp_mask & __GFP_NO_KSWAPD))
- wake_all_kswapds(order, zonelist, high_zoneidx, preferred_zone);
+ wake_all_kswapds(order, zonelist, high_zoneidx,
+ preferred_zone, nodemask);
/*
* OK, we're below the kswapd watermark and have kicked background
--
1.7.10.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>