linux-kernel - Re: Hardware Error Kernel Mini-Summit

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Message-ID: <20100519063933.GA32581@elte.hu>
Date:	Wed, 19 May 2010 08:39:33 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Tony Luck <tony.luck@...el.com>
Cc:	Joe Perches <joe@...ches.com>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"bluesmoke-devel@...ts.sourceforge.net" 
	<bluesmoke-devel@...ts.sourceforge.net>,
	Linux Edac Mailing List <linux-edac@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Ben Woodard <woodard@...hat.com>,
	Matt Domsch <Matt_Domsch@...l.com>,
	Doug Thompson <dougthompson@...ssion.com>,
	Borislav Petkov <bp@...64.org>,
	"Young, Brent" <brent.young@...el.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: Hardware Error Kernel Mini-Summit


* Tony Luck <tony.luck@...el.com> wrote:

> > 3) Another new perf feature of interest is 'perf 
> > inject' (this too went upstream today): to inject 
> > artificial events into the stream of events. This 
> > mechanism could be used to simulate rare error 
> > conditions and to test out policy reactions 
> > systematically - an important part of system error 
> > recovery testing.
> 
> Simulated errors are handy for testing the very top 
> level of the s/w stack. But real errors are better. 
> There's some APEI code in Len's tree that can inject 
> real errors (on systems with the right BIOS hooks 
> enabled).

Agreed, hardware assisted error injection is by far the 
best and most complete solution.

Thanks,

	Ingo
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