diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm_inline.h | 19 | ||||
| -rw-r--r-- | include/linux/mmzone.h | 6 |
2 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h index 2eb599465d5..f451fedd1e7 100644 --- a/include/linux/mm_inline.h +++ b/include/linux/mm_inline.h @@ -117,4 +117,23 @@ static inline enum lru_list page_lru(struct page *page) return lru; } +/** + * inactive_anon_is_low - check if anonymous pages need to be deactivated + * @zone: zone to check + * + * Returns true if the zone does not have enough inactive anon pages, + * meaning some active anon pages need to be deactivated. + */ +static inline int inactive_anon_is_low(struct zone *zone) +{ + unsigned long active, inactive; + + active = zone_page_state(zone, NR_ACTIVE_ANON); + inactive = zone_page_state(zone, NR_INACTIVE_ANON); + + if (inactive * zone->inactive_ratio < active) + return 1; + + return 0; +} #endif diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 59a4c8fd6eb..9c5111f49a3 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -323,6 +323,12 @@ struct zone { */ int prev_priority; + /* + * The target ratio of ACTIVE_ANON to INACTIVE_ANON pages on + * this zone's LRU. Maintained by the pageout code. + */ + unsigned int inactive_ratio; + ZONE_PADDING(_pad2_) /* Rarely used or read-mostly fields */ |