diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 82e7db7f7100..f87d16d28e3e 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -241,7 +241,11 @@ static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item) static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item) { atomic_long_dec(&zone->vm_stat[item]); + if (item == NR_FILE_DIRTY && unlikely(atomic_long_read(&zone->vm_stat[item]) < 0)) + atomic_long_set(&zone->vm_stat[item], 0); atomic_long_dec(&vm_stat[item]); + if (item == NR_FILE_DIRTY && unlikely(atomic_long_read(&vm_stat[item]) < 0)) + atomic_long_set(&vm_stat[item], 0); } static inline void __inc_zone_page_state(struct page *page,