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Message-ID: <1355197690.1933.20.camel@kernel.cn.ibm.com>
Subject: Re: [PATCH V2] MCE: fix an error of mce_bad_pages statistics
From: Simon Jeons <simon.jeons@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Xishi Qiu <qiuxishi@huawei.com>, Wanpeng Li <liwanp@linux.vnet.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        WuJianguo <wujianguo@huawei.com>, Liujiang <jiang.liu@huawei.com>,
        Vyacheslav.Dubeyko@huawei.com, Borislav Petkov <bp@alien8.de>,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org, wency@cn.fujitsu.com
Date: Mon, 10 Dec 2012 21:48:10 -0600
In-Reply-To: <20121211031907.GZ16230@one.firstfloor.org>
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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