diff options
| -rw-r--r-- | mm/page_alloc.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 80ef99234b89..18747528eec3 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1158,8 +1158,10 @@ void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp) to_drain = pcp->batch; else to_drain = pcp->count; - free_pcppages_bulk(zone, to_drain, pcp); - pcp->count -= to_drain; + if (to_drain > 0) { + free_pcppages_bulk(zone, to_drain, pcp); + pcp->count -= to_drain; + } local_irq_restore(flags); } #endif @@ -3915,7 +3917,8 @@ static int __zone_pcp_update(void *data) pcp = &pset->pcp; local_irq_save(flags); - free_pcppages_bulk(zone, pcp->count, pcp); + if (pcp->count > 0) + free_pcppages_bulk(zone, pcp->count, pcp); setup_pageset(pset, batch); local_irq_restore(flags); } |