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

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Message-ID: <20121211031907.GZ16230@one.firstfloor.org>
Date:	Tue, 11 Dec 2012 04:19:07 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Simon Jeons <simon.jeons@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>, 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 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.

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