linux-kernel - Re: [PATCH 1/5] HWPOISON: define VM_FAULT_HWPOISON to 0 when feature is disabled

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Message-ID: <20090612154525.GA14438@elte.hu>
Date:	Fri, 12 Jun 2009 17:45:25 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Nick Piggin <npiggin@...e.de>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Andi Kleen <andi@...stfloor.org>,
	"riel@...hat.com" <riel@...hat.com>,
	"chris.mason@...cle.com" <chris.mason@...cle.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 1/5] HWPOISON: define VM_FAULT_HWPOISON to 0 when
	feature is disabled


* Ingo Molnar <mingo@...e.hu> wrote:

> So i find the whole feature rather dubious - what's the point? We 
> should panic at this point - we just corrupted user data so that 
> piece of hardware cannot be trusted. Nor can any subsequent kernel 
> bug messages be trusted.

s/panic/print nasty message

Not sure what i was smoking there. Sysadmin will panic from a memory 
corruption message anyway.

What feels wrong to me is: kill a process and - in the case where 
that process is restartable or expendable - suggest to the admin 
that "everything is fine, we handled it just fine".

	Ingo
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