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Subject: RE: [RFC/Requirements/Design] h/w error reporting
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: "Luck, Tony" <tony.luck@intel.com>
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Date: Wed, 10 Nov 2010 19:31:56 +0100
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On Wed, 2010-11-10 at 10:23 -0800, Luck, Tony wrote:
> > A few of things that pop up quickly are:
> >
> > 1) lockless
> 
> This is a clear requirement for use in h/w error
> reporting too.  Taking locks in NMI or machine
> check handler isn't an option.

Don't worry, lots of PMIs are NMIs, perf needs to be fully NMI safe
otherwise things simply don't work.