linux-kernel - Re: [PATCH] perf cgroup: Add __percpu annotation to perf

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Date:	Mon, 18 Mar 2013 10:39:43 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>, Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH] perf cgroup: Add __percpu annotation to perf_cgroup->info


* Namhyung Kim <namhyung@...nel.org> wrote:

> From: Namhyung Kim <namhyung.kim@....com>
> 
> It's a per-cpu data structure but missed the __percpu annotation.
> 
> Cc: Tejun Heo <tj@...nel.org>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  include/linux/perf_event.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 001a3b64fe61..16116aee9405 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -311,8 +311,8 @@ struct perf_cgroup_info {
>  };
>  
>  struct perf_cgroup {
> -	struct				cgroup_subsys_state css;
> -	struct				perf_cgroup_info *info;	/* timing info, one per cpu */
> +	struct cgroup_subsys_state 	css;
> +	struct perf_cgroup_info __percpu * info;
>  };
>  #endif

Would be nice to have this against tip:master - 'struct perf_cgroup' 
recently moved to kernel/events/, in the development tree.

Thanks,

	Ingo
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