linux-kernel - Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoint for x86 & x86

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Message-ID: <20101110162806.GD7205@basil.fritz.box>
Date:	Wed, 10 Nov 2010 17:28:06 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Jiri Olsa <jolsa@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, rostedt@...dmis.org,
	andi@...stfloor.org, lwoodman@...hat.com,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoint for
 x86 & x86_64

On Wed, Nov 10, 2010 at 10:20:02AM -0500, Christoph Hellwig wrote:
> On Wed, Nov 10, 2010 at 04:17:50PM +0100, Jiri Olsa wrote:
> > I guess I can take the regs out then.. would that patch be acceptable
> > afterwards..?
> 
> I really can't make much sense out of this whole trace point.  What
> use it the task_struct address for example?
> 
> What would be much more interesting is telling us if we had a
> major/minor fault, if ->page_mkwrite was called, etc.

Also on x86 I would log the error code.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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