linux-kernel - Re: [PATCH 2/2] perf lock: Fix output of tracing lock events

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Message-ID: <20091217085023.GC1901@elte.hu>
Date:	Thu, 17 Dec 2009 09:50:23 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 2/2] perf lock: Fix output of tracing lock events


* Hitoshi Mitake <mitake@....info.waseda.ac.jp> wrote:

> This patch adds address of lockdep_map to each lock events.
> perf lock uses these addresses as IDs of lock instances.
> 
> And this removes waittime from output of lock_acquired event.
> The value will be caliculated in userspace based on timestamp.
> 
> Signed-off-by: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> ---
>  include/trace/events/lock.h |   27 ++++++++++++++++++---------
>  kernel/lockdep.c            |    2 +-
>  2 files changed, 19 insertions(+), 10 deletions(-)

Frederic, Peter, do these two patches look good to you? We can apply them to 
make subsequent perf lock work easier.

Thanks,

	Ingo
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