diff options
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 8277f93148b5..f8b94ea6f722 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1596,6 +1596,14 @@ int zone_reclaim_mode __read_mostly; * Mininum time between zone reclaim scans */ #define ZONE_RECLAIM_INTERVAL 30*HZ + +/* + * Priority for ZONE_RECLAIM. This determines the fraction of pages + * of a node considered for each zone_reclaim. 4 scans 1/16th of + * a zone. + */ +#define ZONE_RECLAIM_PRIORITY 4 + /* * Try to free up some pages from this zone through reclaim. */ @@ -1626,7 +1634,7 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order) sc.may_swap = 0; sc.nr_scanned = 0; sc.nr_reclaimed = 0; - sc.priority = 0; + sc.priority = ZONE_RECLAIM_PRIORITY + 1; sc.nr_mapped = read_page_state(nr_mapped); sc.gfp_mask = gfp_mask; @@ -1643,7 +1651,15 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order) reclaim_state.reclaimed_slab = 0; p->reclaim_state = &reclaim_state; - shrink_zone(zone, &sc); + /* + * Free memory by calling shrink zone with increasing priorities + * until we have enough memory freed. + */ + do { + sc.priority--; + shrink_zone(zone, &sc); + + } while (sc.nr_reclaimed < nr_pages && sc.priority > 0); p->reclaim_state = NULL; current->flags &= ~PF_MEMALLOC; |