diff options
author | Balbir Singh <balbir@linux.vnet.ibm.com> | 2008-04-29 12:00:16 +0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 19:06:10 +0400 |
commit | cf475ad28ac35cc9ba612d67158f29b73b38b05d (patch) | |
tree | 2c7cd568d00357bd42643ea602884e731cc24f26 /include/linux/memcontrol.h | |
parent | 29486df325e1fe6e1764afcb19e3370804c2b002 (diff) | |
download | linux-cf475ad28ac35cc9ba612d67158f29b73b38b05d.tar.xz |
cgroups: add an owner to the mm_struct
Remove the mem_cgroup member from mm_struct and instead adds an owner.
This approach was suggested by Paul Menage. The advantage of this approach
is that, once the mm->owner is known, using the subsystem id, the cgroup
can be determined. It also allows several control groups that are
virtually grouped by mm_struct, to exist independent of the memory
controller i.e., without adding mem_cgroup's for each controller, to
mm_struct.
A new config option CONFIG_MM_OWNER is added and the memory resource
controller selects this config option.
This patch also adds cgroup callbacks to notify subsystems when mm->owner
changes. The mm_cgroup_changed callback is called with the task_lock() of
the new task held and is called just prior to changing the mm->owner.
I am indebted to Paul Menage for the several reviews of this patchset and
helping me make it lighter and simpler.
This patch was tested on a powerpc box, it was compiled with both the
MM_OWNER config turned on and off.
After the thread group leader exits, it's moved to init_css_state by
cgroup_exit(), thus all future charges from runnings threads would be
redirected to the init_css_set's subsystem.
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Sudhir Kumar <skumar@linux.vnet.ibm.com>
Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Cc: Hirokazu Takahashi <taka@valinux.co.jp>
Cc: David Rientjes <rientjes@google.com>,
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Reviewed-by: Paul Menage <menage@google.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
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 | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 8b1c4295848b..e6608776bc96 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -27,9 +27,6 @@ struct mm_struct; #ifdef CONFIG_CGROUP_MEM_RES_CTLR -extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p); -extern void mm_free_cgroup(struct mm_struct *mm); - #define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0) extern struct page_cgroup *page_get_page_cgroup(struct page *page); @@ -48,8 +45,10 @@ extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); +extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); + #define mm_match_cgroup(mm, cgroup) \ - ((cgroup) == rcu_dereference((mm)->mem_cgroup)) + ((cgroup) == mem_cgroup_from_task((mm)->owner)) extern int mem_cgroup_prepare_migration(struct page *page); extern void mem_cgroup_end_migration(struct page *page); @@ -73,15 +72,6 @@ extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, struct zone *zone, int priority); #else /* CONFIG_CGROUP_MEM_RES_CTLR */ -static inline void mm_init_cgroup(struct mm_struct *mm, - struct task_struct *p) -{ -} - -static inline void mm_free_cgroup(struct mm_struct *mm) -{ -} - static inline void page_reset_bad_cgroup(struct page *page) { } |