diff options
author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2008-10-22 14:15:05 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-23 08:55:02 -0700 |
commit | 94b6da5ab8293b04a300ba35c72eddfa94db8b02 (patch) | |
tree | 8ca1c8abb7934ab51657fffeb26a5f5aabd34743 /include/linux | |
parent | be07c4ed4043ab8c26f222348136141335e47a2f (diff) |
memcg: fix page_cgroup allocation
page_cgroup_init() is called from mem_cgroup_init(). But at this
point, we cannot call alloc_bootmem().
(and this caused panic at boot.)
This patch moves page_cgroup_init() to init/main.c.
Time table is following:
==
parse_args(). # we can trust mem_cgroup_subsys.disabled bit after this.
....
cgroup_init_early() # "early" init of cgroup.
....
setup_arch() # memmap is allocated.
...
page_cgroup_init();
mem_init(); # we cannot call alloc_bootmem after this.
....
cgroup_init() # mem_cgroup is initialized.
==
Before page_cgroup_init(), mem_map must be initialized. So,
I added page_cgroup_init() to init/main.c directly.
(*) maybe this is not very clean but
- cgroup_init_early() is too early
- in cgroup_init(), we have to use vmalloc instead of alloc_bootmem().
use of vmalloc area in x86-32 is important and we should avoid very large
vmalloc() in x86-32. So, we want to use alloc_bootmem() and added page_cgroup_init()
directly to init/main.c
[akpm@linux-foundation.org: remove unneeded/bad mem_cgroup_subsys declaration]
[akpm@linux-foundation.org: fix build]
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Tested-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/page_cgroup.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h index 0fd39f2231e..f546ad6fc02 100644 --- a/include/linux/page_cgroup.h +++ b/include/linux/page_cgroup.h @@ -99,5 +99,10 @@ static inline struct page_cgroup *lookup_page_cgroup(struct page *page) { return NULL; } + +static inline void page_cgroup_init(void) +{ +} + #endif #endif |