linux-kernel - Re: [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages

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Message-ID: <20090529184243.GA1065@one.firstfloor.org>
Date:	Fri, 29 May 2009 20:42:43 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	fengguang.wu@...el.com
Subject: Re: [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages

On Fri, May 29, 2009 at 02:26:05PM -0400, Rik van Riel wrote:
> Andi Kleen wrote:
> >On Fri, May 29, 2009 at 12:34:32PM -0400, Rik van Riel wrote:
> >>>They should just check for poisoned pages. 
> >>#define PagePoisoned(page) (PageReserved(page) && PageWriteback(page))
> >
> >I don't know what the point of that would be. An exercise in code
> >obfuscation?
> 
> Saving a page flag.

It seems pointless to me. 64bit has enough space and 32bit just puts
less node bits into ->flags.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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