linux-kernel - Re: [PATCH 00/22] HWPOISON: Intro (v5)

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Message-ID: <4A380086.7020904@zytor.com>
Date:	Tue, 16 Jun 2009 13:28:54 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Russ Anderson <rja@....com>
CC:	Andi Kleen <andi@...stfloor.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Mel Gorman <mel@....ul.ie>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Nick Piggin <npiggin@...e.de>,
	"riel@...hat.com" <riel@...hat.com>,
	"chris.mason@...cle.com" <chris.mason@...cle.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 00/22] HWPOISON: Intro (v5)

Russ Anderson wrote:
> On Mon, Jun 15, 2009 at 03:29:34PM +0200, Andi Kleen wrote:
>> I think you're wrong about killing processes decreasing
>> reliability. Traditionally we always tried to keep things running if possible
>> instead of panicing.
> 
> Customers love the ia64 feature of killing a user process instead of
> panicing the system when a user process hits a memory uncorrectable
> error.  Avoiding a system panic is a very good thing.

Sometimes (sometimes it's a very bad thing.)

However, the more fundamental thing is that it is always trivial to
promote an error to a higher severity; the opposite is not true.  As
such, it becomes an administrator-set policy, which is what it needs to be.

	-hpa
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