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Date: Mon, 23 Nov 2009 13:39:37 +0100
From: Frederic Weisbecker <fweisbec@gmail.com>
To: mingo@redhat.com, hpa@zytor.com, paulus@samba.org,
       linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl,
       tglx@linutronix.de, mingo@elte.hu
Cc: linux-tip-commits@vger.kernel.org
Subject: Re: [tip:perf/core] perf_events: Undo some recursion damage
Message-ID: <20091123123935.GB4989@nowhere>
References: <20091123103819.993226816@chello.nl> <tip-4ed7c92d68a5387ba5f7030dc76eab03558e27f5@git.kernel.org>
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On Mon, Nov 23, 2009 at 11:55:08AM +0000, tip-bot for Peter Zijlstra wrote:
> Commit-ID:  4ed7c92d68a5387ba5f7030dc76eab03558e27f5
> Gitweb:     http://git.kernel.org/tip/4ed7c92d68a5387ba5f7030dc76eab03558e27f5
> Author:     Peter Zijlstra <a.p.zijlstra@chello.nl>
> AuthorDate: Mon, 23 Nov 2009 11:37:29 +0100
> Committer:  Ingo Molnar <mingo@elte.hu>
> CommitDate: Mon, 23 Nov 2009 11:49:57 +0100
> 
> perf_events: Undo some recursion damage
> 
> Make perf_swevent_get_recursion_context return a context number
> and disable preemption.
> 
> This could be used to remove the IRQ disable from the trace bit
> and index the per-cpu buffer with.


But if I do that, it means I will lose traces once irq nest.