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Date: Wed, 19 May 2010 11:13:35 +0200
From: Frederic Weisbecker <fweisbec@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: mingo@redhat.com, hpa@zytor.com, paulus@samba.org, acme@redhat.com,
       linux-kernel@vger.kernel.org, efault@gmx.de, rostedt@goodmis.org,
       tglx@linutronix.de, mingo@elte.hu, linux-tip-commits@vger.kernel.org
Subject: Re: [tip:perf/core] perf/ftrace: Optimize perf/tracepoint
	interaction for single events
Message-ID: <20100519091333.GL5704@nowhere>
References: <tip-4f41c013f553957765902fb01475972f0af3e8e7@git.kernel.org> <20100519075804.GF5704@nowhere> <1274257123.5605.10260.camel@twins> <20100519082335.GG5704@nowhere> <1274259525.5605.10352.camel@twins> <20100519090654.GK5704@nowhere> <1274260348.5605.10379.camel@twins>
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On Wed, May 19, 2010 at 11:12:28AM +0200, Peter Zijlstra wrote:
> On Wed, 2010-05-19 at 11:06 +0200, Frederic Weisbecker wrote:
> > On Wed, May 19, 2010 at 10:58:45AM +0200, Peter Zijlstra wrote:
> > > How about something like the below?
> > > 
> > > 
> > > ---
> > > Subject: perf, trace: Remove IRQ-disable from perf/tracepoint interaction
> > > From: Peter Zijlstra <a.p.zijlstra@chello.nl>
> > > Date: Wed May 19 10:52:27 CEST 2010
> > > 
> > > 
> > > 
> > > Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
> > > ---
> > 
> > 
> > 
> > Looks fine if we don't have nested irqs.
> 
> Well, I was thinking the per-context recursion thing would sort that
> out. We can have 1 event per context in-flight.


Ah good point.