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mm: memcontrol: replace mem_cgroup_lruvec_online with mem_cgroup_online 

mem_cgroup_lruvec_online() takes lruvec, but it only needs memcg.  Since
get_scan_count(), which is the only user of this function, now possesses
pointer to memcg, let's pass memcg directly to mem_cgroup_online() instead
of picking it out of lruvec and rename the function accordingly.

Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vladimir Davydov 2016-01-20 15:03:02 -08:00 committed by Linus Torvalds
parent 3337767850
commit eb01aaab43
2 changed files with 11 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
include/linux/memcontrol.h
View File

@ -355,6 +355,13 @@ static inline bool mem_cgroup_disabled(void)
return !cgroup_subsys_enabled(memory_cgrp_subsys);
}
static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
{
if (mem_cgroup_disabled())
return true;
return !!(memcg->css.flags & CSS_ONLINE);
}
/*
* For memory reclaim.
*/
@ -363,20 +370,6 @@ int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
int nr_pages);
static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec)
{
struct mem_cgroup_per_zone *mz;
struct mem_cgroup *memcg;
if (mem_cgroup_disabled())
return true;
mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec);
memcg = mz->memcg;
return !!(memcg->css.flags & CSS_ONLINE);
}
static inline
unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
{
@ -589,13 +582,13 @@ static inline bool mem_cgroup_disabled(void)
return true;
}
static inline bool
mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
{
return true;
}
static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec)
static inline bool
mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
{
return true;
}

2
mm/vmscan.c
View File

@ -1997,7 +1997,7 @@ static void get_scan_count(struct lruvec *lruvec, struct mem_cgroup *memcg,
if (current_is_kswapd()) {
if (!zone_reclaimable(zone))
force_scan = true;
if (!mem_cgroup_lruvec_online(lruvec))
if (!mem_cgroup_online(memcg))
force_scan = true;
}
if (!global_reclaim(sc))