linux-kernel - Re: [PATCH 2/4] trace: prepare to collect call chains of non-current task.

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Message-ID: <20111014191227.GB23666@dev1756.snc6.facebook.com>
Date:	Fri, 14 Oct 2011 12:12:27 -0700
From:	Arun Sharma <asharma@...com>
To:	Andrew Vagin <avagin@...nvz.org>
Cc:	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: Re: [PATCH 2/4] trace: prepare to collect call chains of non-current
 task.

On Mon, Sep 26, 2011 at 07:55:33PM +0400, Andrew Vagin wrote:
> This patch adds argument "task" to all functions between perf_tp_event()
> and perf_callchain(). All logic is in the next patch.
> 
> We need "task" and "regs" simultaneously, because regs contains
> state of current task, before it entered in perf code. Task contains
> pointer to task_struct and it will be used for collecting call chains
> and filling event data, if task isn't current.
> 
> Signed-off-by: Andrew Vagin <avagin@...nvz.org>

Acked-by: Arun Sharma <asharma@...com>

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