linux-kernel - Re: [PATCH] perf: Keep the perf_event

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Date:	Wed, 22 Aug 2012 15:18:34 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Jiri Olsa <jolsa@...hat.com>, mingo@...nel.org, eranian@...gle.com,
	gorcunov@...nvz.org, benjamin.redelings@...cent.org,
	fweisbec@...il.com, robert.richter@....com, drepper@...il.com,
	tglx@...utronix.de, cjashfor@...ux.vnet.ibm.com, asharma@...com,
	paulus@...ba.org, linux-kernel@...r.kernel.org, hpa@...or.com,
	fche@...hat.com, tzanussi@...il.com,
	masami.hiramatsu.pt@...achi.com, mingo@...e.hu
Subject: Re: [PATCH] perf: Keep the perf_event_attr on version 3

Em Wed, Aug 22, 2012 at 10:35:40AM +0200, Jiri Olsa escreveu:
> On Tue, Aug 21, 2012 at 07:11:56PM +0200, Peter Zijlstra wrote:
> > On Tue, 2012-08-21 at 08:49 -0700, tip-bot for Jiri Olsa wrote:
> > >  #define PERF_ATTR_SIZE_VER3    88      /* add: sample_regs_user */
> > > +#define PERF_ATTR_SIZE_VER4    96      /* add: sample_stack_user */
> > 
> > Both are introduced in this patch set, there's no release in between,
> > why are we doing two version increments? Seems like pointless version
> > space inflation to me.
> 
> not sure why I did that, attached patch returns that to version3

I'm lazy so couldn't quickly find any problem in applying this patch,
Peter, can you see any problem?

Will add your Acked-by if you can't.

- Arnaldo
 
> jirka
> 
> ---
> Stashing version 4 under version 3 and removing version 4,
> because both version changes were within single patchset.
> 
> Reported-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Cc: Ingo Molnar <mingo@...e.hu>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Signed-off-by: Jiri Olsa <jolsa@...hat.com>
> ---
>  include/linux/perf_event.h | 4 ++--
>  tools/perf/util/header.c   | 1 -
>  2 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 297ca3d..28f9cee 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -205,8 +205,8 @@ enum perf_event_read_format {
>  #define PERF_ATTR_SIZE_VER0	64	/* sizeof first published struct */
>  #define PERF_ATTR_SIZE_VER1	72	/* add: config2 */
>  #define PERF_ATTR_SIZE_VER2	80	/* add: branch_sample_type */
> -#define PERF_ATTR_SIZE_VER3	88	/* add: sample_regs_user */
> -#define PERF_ATTR_SIZE_VER4	96	/* add: sample_stack_user */
> +#define PERF_ATTR_SIZE_VER3	96	/* add: sample_regs_user */
> +					/* add: sample_stack_user */
>  
>  /*
>   * Hardware event_id to monitor via a performance monitoring event:
> diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
> index 1e5b6aa..5ed4812 100644
> --- a/tools/perf/util/header.c
> +++ b/tools/perf/util/header.c
> @@ -1831,7 +1831,6 @@ static const int attr_file_abi_sizes[] = {
>  	[1] = PERF_ATTR_SIZE_VER1,
>  	[2] = PERF_ATTR_SIZE_VER2,
>  	[3] = PERF_ATTR_SIZE_VER3,
> -	[4] = PERF_ATTR_SIZE_VER4,
>  	0,
>  };
>  
> -- 
> 1.7.11.4
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