linux-kernel - Re: [PATCH V2] MCE: fix an error of mce_bad

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Message-ID: <1355197690.1933.20.camel@kernel.cn.ibm.com>
Date:	Mon, 10 Dec 2012 21:48:10 -0600
From:	Simon Jeons <simon.jeons@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Xishi Qiu <qiuxishi@...wei.com>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	WuJianguo <wujianguo@...wei.com>,
	Liujiang <jiang.liu@...wei.com>, Vyacheslav.Dubeyko@...wei.com,
	Borislav Petkov <bp@...en8.de>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, wency@...fujitsu.com
Subject: Re: [PATCH V2] MCE: fix an error of mce_bad_pages statistics

On Tue, 2012-12-11 at 04:19 +0100, Andi Kleen wrote:
> On Mon, Dec 10, 2012 at 09:13:11PM -0600, Simon Jeons wrote:
> > On Tue, 2012-12-11 at 04:01 +0100, Andi Kleen wrote:
> > > > Oh, it will be putback to lru list during migration. So does your "some
> > > > time" mean before call check_new_page?
> > > 
> > > Yes until the next check_new_page() whenever that is. If the migration
> > > works it will be earlier, otherwise later.
> > 
> > But I can't figure out any page reclaim path check if the page is set
> > PG_hwpoison, can poisoned pages be rclaimed?
> 
> The only way to reclaim a page is to free and reallocate it.

Then why there doesn't have check in reclaim path to avoid relcaim
poisoned page?

			-Simon

> 
> -Andi


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