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mm: memcontrol: track move_lock state internally

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The complexity of memcg page stat synchronization is currently leaking
into the callsites, forcing them to keep track of the move_lock state and
the IRQ flags.  Simplify the API by tracking it in the memcg.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
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 2015-02-11 15:25:01 -08:00 • committed by Linus Torvalds
commit 6de226191d
4 changed files with 51 additions and 53 deletions
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12
include/linux/memcontrol.h
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@ -138,12 +138,10 @@ static inline bool mem_cgroup_disabled(void)
return false;
}
struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page, bool *locked,
unsigned long *flags);
void mem_cgroup_end_page_stat(struct mem_cgroup *memcg, bool *locked,
unsigned long *flags);
struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page);
void mem_cgroup_update_page_stat(struct mem_cgroup *memcg,
enum mem_cgroup_stat_index idx, int val);
void mem_cgroup_end_page_stat(struct mem_cgroup *memcg);
static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
enum mem_cgroup_stat_index idx)
@ -285,14 +283,12 @@ mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
{
}
static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page,
bool *locked, unsigned long *flags)
static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page)
{
return NULL;
}
static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg,
bool *locked, unsigned long *flags)
static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg)
{
}