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| author | Balbir Singh <balbir@linux.vnet.ibm.com> | 2008-02-07 09:14:01 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 17:42:19 +0100 |
| commit | bed7161a519a2faef53e1bce1b47595e297c1d14 (patch) | |
| tree | fbc0541340465f7d83221b829a9382cac2855916 /mm/memcontrol.c | |
| parent | Memory controller: add switch to control what type of pages to limit (diff) | |
| download | linux-bed7161a519a2faef53e1bce1b47595e297c1d14.tar.xz linux-bed7161a519a2faef53e1bce1b47595e297c1d14.zip | |
Memory controller: make page_referenced() cgroup aware
Make page_referenced() cgroup aware. Without this patch, page_referenced()
can cause a page to be skipped while reclaiming pages. This patch ensures
that other cgroups do not hold pages in a particular cgroup hostage. It
is required to ensure that shared pages are freed from a cgroup when they
are not actively referenced from the cgroup that brought them in
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Paul Menage <menage@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Kirill Korotaev <dev@sw.ru>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: David Rientjes <rientjes@google.com>
Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 10833d969e3f..ff7cac602984 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -110,6 +110,11 @@ struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p) struct mem_cgroup, css); } +inline struct mem_cgroup *mm_cgroup(struct mm_struct *mm) +{ + return rcu_dereference(mm->mem_cgroup); +} + void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p) { struct mem_cgroup *mem; |