linux-kernel - Re: [PATCH 8/8] pagemap: export PG

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Date:	Fri, 8 May 2009 13:49:36 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>,
	Matt Mackall <mpm@...enic.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org
Subject: Re: [PATCH 8/8] pagemap: export PG_hwpoison


* Wu Fengguang <fengguang.wu@...el.com> wrote:

> This flag indicates a hardware detected memory corruption on the 
> page. Any future access of the page data may bring down the 
> machine.

NAK on this whole idea, it's utterly harmful. At _minimum_ 
/proc/kpageflags should be moved to /debug/vm/ to not have
any ABI bindings.

	Ingo
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