linux-kernel - Re: [RFC] [PATCH 0/5] Teach perf tool to profile sleep times (V4)

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Message-ID: <4FCCE9F5.9050808@fb.com>
Date:	Mon, 4 Jun 2012 10:01:41 -0700
From:	Arun Sharma <asharma@...com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	Andrew Vagin <avagin@...nvz.org>,
	Oleg Strikov <OSTRIKOV@...dia.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] [PATCH 0/5] Teach perf tool to profile sleep times (V4)

On 6/4/12 5:40 AM, Peter Zijlstra wrote:

> And as a result you need that hideous prev_state crap.
>
>
> Would something like the below work?
>
> The one thing I'm not entirely sure of is if this is a sekjoerity issue
> or not.. anybody? I would think a task was entitled to know who woke it
> and wherefrom etc..

Frederic had some comments on this topic in the last round:

http://thread.gmane.org/gmane.linux.kernel/1195368/focus=1195959

 > We should probably avoid the remote callchains, sounds like asking 
for complications everywhere.

Do they still apply? Frederic?

  -Arun
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