linux-kernel - Re: [PATCH] perf_counter: Provide functions for locking and pinning the context for a task

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Message-ID: <18980.19019.158462.125715@cargo.ozlabs.ibm.com>
Date:	Tue, 2 Jun 2009 07:38:19 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf_counter: Provide functions for locking and
	pinning the context for a task

Ingo Molnar writes:

> -tip testing found that these patches are causing a crash:

Argh.  What was userspace doing at the time of the crash, do you know?
It looks like it might have been on/off-lining a cpu, judging by the
stack trace.  Would there have been any counters attached to the task
doing there, or were there any per-cpu counters active?

Paul.
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