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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
parent 93aa7d9524
commit 6de226191d
4 changed files with 51 additions and 53 deletions
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12
mm/rmap.c
View file

@ -1085,24 +1085,20 @@ void page_add_new_anon_rmap(struct page *page,
void page_add_file_rmap(struct page *page)
{
struct mem_cgroup *memcg;
unsigned long flags;
bool locked;
memcg = mem_cgroup_begin_page_stat(page, &locked, &flags);
memcg = mem_cgroup_begin_page_stat(page);
if (atomic_inc_and_test(&page->_mapcount)) {
__inc_zone_page_state(page, NR_FILE_MAPPED);
mem_cgroup_inc_page_stat(memcg, MEM_CGROUP_STAT_FILE_MAPPED);
}
mem_cgroup_end_page_stat(memcg, &locked, &flags);
mem_cgroup_end_page_stat(memcg);
}
static void page_remove_file_rmap(struct page *page)
{
struct mem_cgroup *memcg;
unsigned long flags;
bool locked;
memcg = mem_cgroup_begin_page_stat(page, &locked, &flags);
memcg = mem_cgroup_begin_page_stat(page);
/* page still mapped by someone else? */
if (!atomic_add_negative(-1, &page->_mapcount))
@ -1123,7 +1119,7 @@ static void page_remove_file_rmap(struct page *page)
if (unlikely(PageMlocked(page)))
clear_page_mlock(page);
out:
mem_cgroup_end_page_stat(memcg, &locked, &flags);
mem_cgroup_end_page_stat(memcg);
}
/**