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

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Message-ID: <20121210153805.GS16230@one.firstfloor.org>
Date:	Mon, 10 Dec 2012 16:38:05 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Xishi Qiu <qiuxishi@...wei.com>
Cc:	Simon Jeons <simon.jeons@...il.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>, andi@...stfloor.org,
	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

> It is another topic, I mean since the page is poisoned, so why not isolate it
> from page buddy alocator in soft_offline_page() rather than in check_new_page().
> I find soft_offline_page() only migrate the page and mark HWPoison, the poisoned
> page is still managed by page buddy alocator.

Doing it in check_new_page is the only way if the page is currently
allocated by someone. Since that's not uncommon it's simplest to always
do it this way.

-Andi

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