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Subject: Re: [patch 05/24] perfmon: X86 generic code (x86)
From: Peter Zijlstra <peterz@infradead.org>
To: eranian@gmail.com
Cc: Andi Kleen <andi@firstfloor.org>, Thomas Gleixner <tglx@linutronix.de>,
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Date: Thu, 27 Nov 2008 12:52:26 +0100
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On Thu, 2008-11-27 at 12:35 +0100, stephane eranian wrote:
> On Thu, Nov 27, 2008 at 12:31 PM, Andi Kleen <andi@firstfloor.org> wrote:
> >> The only reason why I have to deal with NMI is not so much to allow
> >> for profiling irq-off regions but because I have to share the PMU with
> >> the NMI watchdog. Otherwise I'd have to fail  or disable the NMI watchdog
> >> on the fly.
> >
> > The NMI watchdog is now off by default so failing with it enabled
> > is fine.
> 
> Yes, but most likely it is on in distro kernels.

So? You can disable it on the fly when there is a perfmon user.