Re: [PATCH V5 09/10] Add API to export per-memcg kswapd pid.

[Minchan Kim <minchan.kim@gmail.com>]

On Sat, Apr 16, 2011 at 8:23 AM, Ying Han <yinghan@google.com> wrote:
> This add the API which exports per-memcg kswapd thread pid. The kswapd
> thread is named as "memcg_" + css_id, and the pid can be used to put
> kswapd thread into cpu cgroup later.
>
> $ mkdir /dev/cgroup/memory/A
> $ cat /dev/cgroup/memory/A/memory.kswapd_pid
> memcg_null 0
>
> $ echo 500m >/dev/cgroup/memory/A/memory.limit_in_bytes
> $ echo 50m >/dev/cgroup/memory/A/memory.high_wmark_distance
> $ ps -ef | grep memcg
> root      6727     2  0 14:32 ?        00:00:00 [memcg_3]
> root      6729  6044  0 14:32 ttyS0    00:00:00 grep memcg
>
> $ cat memory.kswapd_pid
> memcg_3 6727
>
> changelog v5..v4
> 1. Initialize the memcg-kswapd pid to -1 instead of 0.
> 2. Remove the kswapds_spinlock.
>
> changelog v4..v3
> 1. Add the API based on KAMAZAWA's request on patch v3.
>
> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> Signed-off-by: Ying Han <yinghan@google.com>
> ---
>  include/linux/swap.h |    2 ++
>  mm/memcontrol.c      |   31 +++++++++++++++++++++++++++++++
>  2 files changed, 33 insertions(+), 0 deletions(-)
>
> diff --git a/include/linux/swap.h b/include/linux/swap.h
> index 319b800..2d3e21a 100644
> --- a/include/linux/swap.h
> +++ b/include/linux/swap.h
> @@ -34,6 +34,8 @@ struct kswapd {
>  };
>
>  int kswapd(void *p);
> +extern spinlock_t kswapds_spinlock;

Remove spinlock.



-- 
Kind regards,
Minchan Kim

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