linux-kernel - Re: [PATCH 1/7] cgroups: Shrink struct cgroup

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Message-ID: <AANLkTikf-1kLStxqi5UjP=vn3pqVBHy0OA7ibeWTkJ5z@mail.gmail.com>
Date:	Thu, 28 Oct 2010 16:34:56 -0700
From:	Paul Menage <menage@...gle.com>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	"akpm >> Andrew Morton" <akpm@...ux-foundation.org>,
	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	containers@...ts.linux-foundation.org
Subject: Re: [PATCH 1/7] cgroups: Shrink struct cgroup_subsys

On Fri, Oct 22, 2010 at 1:09 AM, Li Zefan <lizf@...fujitsu.com> wrote:
> On x86_32, sizeof(struct cgroup_subsys) shrinks from 276 bytes
> to 264.
>
> Signed-off-by: Li Zefan <lizf@...fujitsu.com>

Acked-by: Paul Menage <menage@...gle.com>

Maybe use "bool" here?

Paul

> ---
> include/linux/cgroup.h |   10 ++++++----
>  1 files changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
> index ed4ba11..e23ded6 100644
> --- a/include/linux/cgroup.h
> +++ b/include/linux/cgroup.h
> @@ -481,14 +481,16 @@ struct cgroup_subsys {
>        void (*bind)(struct cgroup_subsys *ss, struct cgroup *root);
>
>        int subsys_id;
> -       int active;
> -       int disabled;
> -       int early_init;
> +
> +       unsigned int active:1;
> +       unsigned int disabled:1;
> +       unsigned int early_init:1;
>        /*
>         * True if this subsys uses ID. ID is not available before cgroup_init()
>         * (not available in early_init time.)
>         */
> -       bool use_id;
> +       unsigned int use_id:1;
> +
>  #define MAX_CGROUP_TYPE_NAMELEN 32
>        const char *name;
>
> --
> 1.7.0.1
>
>
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