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| author | Johannes Weiner <hannes@cmpxchg.org> | 2016-03-15 14:57:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-15 16:55:16 -0700 |
| commit | 62cccb8c8e7a3ca233f49d5e7dcb1557d25465cd (patch) | |
| tree | 43a902faf461c65393a4efebf9ff9622017b92b1 /mm/workingset.c | |
| parent | 6a93ca8fde3cfce0f00f02281139a377c83e8d8c (diff) | |
| download | linux-0-day-62cccb8c8e7a3ca233f49d5e7dcb1557d25465cd.tar.gz linux-0-day-62cccb8c8e7a3ca233f49d5e7dcb1557d25465cd.tar.xz | |
mm: simplify lock_page_memcg()
Now that migration doesn't clear page->mem_cgroup of live pages anymore,
it's safe to make lock_page_memcg() and the memcg stat functions take
pages, and spare the callers from memcg objects.
[akpm@linux-foundation.org: fix warnings]
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Suggested-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/workingset.c')
| -rw-r--r-- | mm/workingset.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/mm/workingset.c b/mm/workingset.c index 14bc23a7779bd..6130ba0b26415 100644 --- a/mm/workingset.c +++ b/mm/workingset.c @@ -305,10 +305,9 @@ bool workingset_refault(void *shadow) */ void workingset_activation(struct page *page) { - struct mem_cgroup *memcg; struct lruvec *lruvec; - memcg = lock_page_memcg(page); + lock_page_memcg(page); /* * Filter non-memcg pages here, e.g. unmap can call * mark_page_accessed() on VDSO pages. @@ -316,12 +315,12 @@ void workingset_activation(struct page *page) * XXX: See workingset_refault() - this should return * root_mem_cgroup even for !CONFIG_MEMCG. */ - if (!mem_cgroup_disabled() && !memcg) + if (!mem_cgroup_disabled() && !page_memcg(page)) goto out; - lruvec = mem_cgroup_zone_lruvec(page_zone(page), memcg); + lruvec = mem_cgroup_zone_lruvec(page_zone(page), page_memcg(page)); atomic_long_inc(&lruvec->inactive_age); out: - unlock_page_memcg(memcg); + unlock_page_memcg(page); } /* |