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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/vmscan.c | |
| parent | 6a93ca8fde3cfce0f00f02281139a377c83e8d8c (diff) | |
| download | linux-62cccb8c8e7a3ca233f49d5e7dcb1557d25465cd.tar.bz2 | |
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/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index fd434cc89bea..34f7e2dae0a0 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -603,12 +603,11 @@ static int __remove_mapping(struct address_space *mapping, struct page *page, bool reclaimed) { unsigned long flags; - struct mem_cgroup *memcg; BUG_ON(!PageLocked(page)); BUG_ON(mapping != page_mapping(page)); - memcg = lock_page_memcg(page); + lock_page_memcg(page); spin_lock_irqsave(&mapping->tree_lock, flags); /* * The non racy check for a busy page. @@ -648,7 +647,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page, mem_cgroup_swapout(page, swap); __delete_from_swap_cache(page); spin_unlock_irqrestore(&mapping->tree_lock, flags); - unlock_page_memcg(memcg); + unlock_page_memcg(page); swapcache_free(swap); } else { void (*freepage)(struct page *); @@ -674,9 +673,9 @@ static int __remove_mapping(struct address_space *mapping, struct page *page, if (reclaimed && page_is_file_cache(page) && !mapping_exiting(mapping) && !dax_mapping(mapping)) shadow = workingset_eviction(mapping, page); - __delete_from_page_cache(page, shadow, memcg); + __delete_from_page_cache(page, shadow); spin_unlock_irqrestore(&mapping->tree_lock, flags); - unlock_page_memcg(memcg); + unlock_page_memcg(page); if (freepage != NULL) freepage(page); @@ -686,7 +685,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page, cannot_free: spin_unlock_irqrestore(&mapping->tree_lock, flags); - unlock_page_memcg(memcg); + unlock_page_memcg(page); return 0; } |