Re: [PATCH 1/7] re-define page_cgroup.

[Li Zefan <lizf@cn.fujitsu.com>]

KAMEZAWA Hiroyuki wrote:
> (This is one of a series of patch for "lookup page_cgroup" patches..)
> 
>  * Exporting page_cgroup definition.
>  * Remove page_cgroup member from sturct page.
>  * As result, PAGE_CGROUP_LOCK_BIT and assign/access functions are removed.
> 
> Other chages will appear in following patches.
> There is a change in the structure itself, spin_lock is added.
> 
> Changelog:
>  - adjusted to rc5-mm1
> 
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> 
> 
>  include/linux/memcontrol.h  |   11 --------
>  include/linux/mm_types.h    |    3 --
>  include/linux/page_cgroup.h |   47 +++++++++++++++++++++++++++++++++++
>  mm/memcontrol.c             |   59 --------------------------------------------
>  mm/page_alloc.c             |    8 -----
>  5 files changed, 48 insertions(+), 80 deletions(-)
> 
> Index: mm-2.6.25-rc5-mm1/include/linux/page_cgroup.h
> ===================================================================
> --- /dev/null
> +++ mm-2.6.25-rc5-mm1/include/linux/page_cgroup.h
> @@ -0,0 +1,47 @@
> +#ifndef __LINUX_PAGE_CGROUP_H
> +#define __LINUX_PAGE_CGROUP_H
> +
> +#ifdef CONFIG_CGROUP_MEM_RES_CTLR
> +/*
> + * page_cgroup is yet another mem_map structure for accounting  usage.

                                                      two spaces ^^

> + * but, unlike mem_map, allocated on demand for accounted pages.
> + * see also memcontrol.h
> + * In nature, this cosumes much amount of memory.
> + */

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