diff options
| author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2008-07-25 10:47:16 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 19:53:37 +0200 |
| commit | b76734e5e34e1889ab9fc5f3756570b1129f0f50 (patch) | |
| tree | 9929c25da8b9c29fcb0c5394023f66b7668cdfa1 | |
| parent | memcg: helper function for relcaim from shmem. (diff) | |
| download | linux-b76734e5e34e1889ab9fc5f3756570b1129f0f50.tar.xz linux-b76734e5e34e1889ab9fc5f3756570b1129f0f50.zip | |
memcg: add hints for branch
Showing brach direction for obvious conditions.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Cc: Paul Menage <menage@google.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memcontrol.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index f46b8615de6c..04ded27f6226 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -550,7 +550,7 @@ retry: * The page_cgroup exists and * the page has already been accounted. */ - if (pc) { + if (unlikely(pc)) { VM_BUG_ON(pc->page != page); VM_BUG_ON(!pc->mem_cgroup); unlock_page_cgroup(page); @@ -559,7 +559,7 @@ retry: unlock_page_cgroup(page); pc = kmem_cache_alloc(page_cgroup_cache, gfp_mask); - if (pc == NULL) + if (unlikely(pc == NULL)) goto err; /* @@ -616,7 +616,7 @@ retry: pc->flags = PAGE_CGROUP_FLAG_ACTIVE; lock_page_cgroup(page); - if (page_get_page_cgroup(page)) { + if (unlikely(page_get_page_cgroup(page))) { unlock_page_cgroup(page); /* * Another charge has been added to this page already. @@ -690,7 +690,7 @@ __mem_cgroup_uncharge_common(struct page *page, enum charge_type ctype) */ lock_page_cgroup(page); pc = page_get_page_cgroup(page); - if (!pc) + if (unlikely(!pc)) goto unlock; VM_BUG_ON(pc->page != page); |