linux-kernel - RE: [RFC/Requirements/Design] h/w error reporting

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Message-ID: <1289413916.2084.30.camel@laptop>
Date:	Wed, 10 Nov 2010 19:31:56 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...e.hu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Huang, Ying" <ying.huang@...el.com>,
	"bp@...en8.de" <bp@...en8.de>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"mchehab@...hat.com" <mchehab@...hat.com>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: RE: [RFC/Requirements/Design] h/w error reporting

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.
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