linux-kernel - Re: [PATCH 10/18] 2.6.17.9 perfmon2 patch for review: PMU context switch support

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Message-ID: <20060825125633.GE5330@frankl.hpl.hp.com>
Date:	Fri, 25 Aug 2006 05:56:33 -0700
From:	Stephane Eranian <eranian@....hp.com>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/18] 2.6.17.9 perfmon2 patch for review: PMU context switch support

On Fri, Aug 25, 2006 at 02:20:31PM +0200, Andi Kleen wrote:
> On Friday 25 August 2006 13:56, Stephane Eranian wrote:
> 
> > > I suppose some of those functions must be marked __kprobes
> > >  
> > Are there any guidelines as to why some functions must be ignored
> > by kprobes? I assume if meaans they cannot be instrumented.
> 
> It does yes.
> 
> In general anything that could cause kprobes to recurse is forbidden.

In the case of the PMU context switch, are you saying that you may
context switch as a consequence of hitting a (K)probe?

-- 

-Stephane
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