diff options
author | Balbir Singh <balbir@linux.vnet.ibm.com> | 2008-02-07 11:14:01 +0300 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 19:42:19 +0300 |
commit | bed7161a519a2faef53e1bce1b47595e297c1d14 (patch) | |
tree | fbc0541340465f7d83221b829a9382cac2855916 /include/linux/memcontrol.h | |
parent | 8697d33194faae6fdd6b2e799f6308aa00cfdf67 (diff) | |
download | linux-bed7161a519a2faef53e1bce1b47595e297c1d14.tar.xz |
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 'include/linux/memcontrol.h')
-rw-r--r-- | include/linux/memcontrol.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index bb6f5105401b..9d0a830423b6 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -43,6 +43,7 @@ extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, int active); extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm); +extern struct mem_cgroup *mm_cgroup(struct mm_struct *mm); static inline void mem_cgroup_uncharge_page(struct page *page) { @@ -93,6 +94,11 @@ static inline int mem_cgroup_cache_charge(struct page *page, return 0; } +static inline struct mem_cgroup *mm_cgroup(struct mm_struct *mm) +{ + return NULL; +} + #endif /* CONFIG_CGROUP_MEM_CONT */ #endif /* _LINUX_MEMCONTROL_H */ |