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Subject: Re: [PATCH 19/22 -v7] trace preempt off critical timings
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>,
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       Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
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       Jan Kiszka <jan.kiszka@siemens.com>, John Stultz <johnstul@us.ibm.com>,
       Arjan van de Ven <arjan@infradead.org>,
       Steven Rostedt <srostedt@redhat.com>
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Date: Wed, 30 Jan 2008 10:40:37 +0100
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On Tue, 2008-01-29 at 22:15 -0500, Steven Rostedt wrote:

> +static DEFINE_PER_CPU(int, tracing_cpu);

Is the per-cpu tracing not also needed for irq off tracing?

Also, its not mentioned in the changelog.