linux-kernel - Re: NMIs induced by 'perf top' hogging all CPU time

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Message-ID: <20130510102911.GB31235@dyad.programming.kicks-ass.net>
Date:	Fri, 10 May 2013 12:29:11 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Dave Hansen <dave@...1.net>
Cc:	Andi Kleen <ak@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>, eranian@...gle.com
Subject: Re: NMIs induced by 'perf top' hogging all CPU time

On Thu, May 09, 2013 at 04:29:16PM -0700, Dave Hansen wrote:
> If I boot a recent kernel (bb9055b) and run 'perf top' on my machine, it
> hangs.  It is 100% reproducible; it happens every single time.  If I'm
> lucky, I'll get some of the hardlockup detection messages on the console.

Are you implicitly saying it worked as expected on previous kernels?
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