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mm: refactor inactive_file_is_low() to use get_lru_size()

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An inactive file list is considered low when its active counterpart is
bigger, regardless of whether it is a global zone LRU list or a memcg
zone LRU list.  The only difference is in how the LRU size is assessed.

get_lru_size() does the right thing for both global and memcg reclaim
situations.

Get rid of inactive_file_is_low_global() and
mem_cgroup_inactive_file_is_low() by using get_lru_size() and compare
the numbers in common code.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2013-02-22 16:35:19 -08:00 committed by Linus Torvalds
parent 860f2759d9
commit e3790144c9
3 changed files with 6 additions and 31 deletions
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7
include/linux/memcontrol.h
View File

@ -116,7 +116,6 @@ void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
* For memory reclaim.
*/
int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec);
int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec);
int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list);
void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int);
@ -321,12 +320,6 @@ mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
return 1;
}
static inline int
mem_cgroup_inactive_file_is_low(struct lruvec *lruvec)
{
return 1;
}
static inline unsigned long
mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
{

11
mm/memcontrol.c
View File

@ -1396,17 +1396,6 @@ int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
return inactive * inactive_ratio < active;
}
int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec)
{
unsigned long active;
unsigned long inactive;
inactive = mem_cgroup_get_lru_size(lruvec, LRU_INACTIVE_FILE);
active = mem_cgroup_get_lru_size(lruvec, LRU_ACTIVE_FILE);
return (active > inactive);
}
#define mem_cgroup_from_res_counter(counter, member) \
container_of(counter, struct mem_cgroup, member)

19
mm/vmscan.c
View File

@ -1579,16 +1579,6 @@ static inline int inactive_anon_is_low(struct lruvec *lruvec)
}
#endif
static int inactive_file_is_low_global(struct zone *zone)
{
unsigned long active, inactive;
active = zone_page_state(zone, NR_ACTIVE_FILE);
inactive = zone_page_state(zone, NR_INACTIVE_FILE);
return (active > inactive);
}
/**
* inactive_file_is_low - check if file pages need to be deactivated
* @lruvec: LRU vector to check
@ -1605,10 +1595,13 @@ static int inactive_file_is_low_global(struct zone *zone)
*/
static int inactive_file_is_low(struct lruvec *lruvec)
{
if (!mem_cgroup_disabled())
return mem_cgroup_inactive_file_is_low(lruvec);
unsigned long inactive;
unsigned long active;
return inactive_file_is_low_global(lruvec_zone(lruvec));
inactive = get_lru_size(lruvec, LRU_INACTIVE_FILE);
active = get_lru_size(lruvec, LRU_ACTIVE_FILE);
return active > inactive;
}
static int inactive_list_is_low(struct lruvec *lruvec, enum lru_list lru)