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-rw-r--r--mm/vmscan.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8760a4abfa1..9e2ef3624d7 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1592,6 +1592,11 @@ module_init(kswapd_init)
*/
int zone_reclaim_mode __read_mostly;
+#define RECLAIM_OFF 0
+#define RECLAIM_ZONE (1<<0) /* Run shrink_cache on the zone */
+#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
+#define RECLAIM_SWAP (1<<2) /* Swap pages out during reclaim */
+
/*
* Mininum time between zone reclaim scans
*/
@@ -1630,8 +1635,8 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
if (!cpus_empty(mask) && node_id != numa_node_id())
return 0;
- sc.may_writepage = 0;
- sc.may_swap = 0;
+ sc.may_writepage = !!(zone_reclaim_mode & RECLAIM_WRITE);
+ sc.may_swap = !!(zone_reclaim_mode & RECLAIM_SWAP);
sc.nr_scanned = 0;
sc.nr_reclaimed = 0;
sc.priority = ZONE_RECLAIM_PRIORITY + 1;