linux-kernel - Re: [RFC][PATCH] HWPOISON: remove the unsafe __set_page

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Message-ID: <Pine.LNX.4.64.0909261251090.15781@sister.anvils>
Date:	Sat, 26 Sep 2009 12:58:53 +0100 (BST)
From:	Hugh Dickins <hugh.dickins@...cali.co.uk>
To:	Wu Fengguang <fengguang.wu@...el.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	Andi Kleen <andi@...stfloor.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH] HWPOISON: remove the unsafe __set_page_locked()

On Sat, 26 Sep 2009, Wu Fengguang wrote:
> 
> However we may well end up to accept the fact that "we just cannot do
> hwpoison 100% correct", and settle with a simple and 99% correct code.

I thought we already accepted that: you cannot do hwpoison 100% correct
(or not without a radical rewrite of the OS); you're just looking to
get it right almost all the time on those systems which have almost
all their pages in pagecache or userspace or free.

Hugh
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