linux-kernel - Re: [PATCH 11/15] HWPOISON: The high level memory error handler in the VM v8

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Message-ID: <20090622093725.GB11541@localhost>
Date:	Mon, 22 Jun 2009 17:37:25 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"hugh.dickins@...cali.co.uk" <hugh.dickins@...cali.co.uk>,
	"npiggin@...e.de" <npiggin@...e.de>,
	"chris.mason@...cle.com" <chris.mason@...cle.com>,
	Rik van Riel <riel@...hat.com>,
	Andi Kleen <ak@...ux.intel.com>, Ingo Molnar <mingo@...e.hu>,
	Minchan Kim <minchan.kim@...il.com>,
	Mel Gorman <mel@....ul.ie>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 11/15] HWPOISON: The high level memory error handler in
	the VM v8

On Sun, Jun 21, 2009 at 04:57:21PM +0800, Andi Kleen wrote:
> > v8:
> > check for page_mapped_in_vma() on anon pages (Hugh, Fengguang)
> 
> This change was no good as discussed earlier.

My understanding is, we don't do page_mapped_in_vma() for file pages.
But for anon pages, this check can avoid killing possibly good tasks.

Thanks,
Fengguang
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