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From: Wu Fengguang <fengguang.wu@intel.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	"hugh.dickins@tiscali.co.uk" <hugh.dickins@tiscali.co.uk>,
	"npiggin@suse.de" <npiggin@suse.de>,
	"chris.mason@oracle.com" <chris.mason@oracle.com>,
	Rik van Riel <riel@redhat.com>, Andi Kleen <ak@linux.intel.com>,
	Ingo Molnar <mingo@elte.hu>, Minchan Kim <minchan.kim@gmail.com>,
	Mel Gorman <mel@csn.ul.ie>, Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH 11/15] HWPOISON: The high level memory error handler in the VM v8
Date: Mon, 22 Jun 2009 17:37:25 +0800	[thread overview]
Message-ID: <20090622093725.GB11541@localhost> (raw)
In-Reply-To: <20090621085721.GD8218@one.firstfloor.org>

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

WARNING: multiple messages have this Message-ID (diff)
From: Wu Fengguang <fengguang.wu@intel.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	"hugh.dickins@tiscali.co.uk" <hugh.dickins@tiscali.co.uk>,
	"npiggin@suse.de" <npiggin@suse.de>,
	"chris.mason@oracle.com" <chris.mason@oracle.com>,
	Rik van Riel <riel@redhat.com>, Andi Kleen <ak@linux.intel.com>,
	Ingo Molnar <mingo@elte.hu>, Minchan Kim <minchan.kim@gmail.com>,
	Mel Gorman <mel@csn.ul.ie>, Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH 11/15] HWPOISON: The high level memory error handler in the VM v8
Date: Mon, 22 Jun 2009 17:37:25 +0800	[thread overview]
Message-ID: <20090622093725.GB11541@localhost> (raw)
In-Reply-To: <20090621085721.GD8218@one.firstfloor.org>

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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  parent reply	other threads:[~2009-06-22  9:37 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-20  3:16 [PATCH 00/15] HWPOISON: Intro (v6) Wu Fengguang
2009-06-20  3:16 ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 01/15] HWPOISON: Add page flag for poisoned pages Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 02/15] HWPOISON: Export some rmap vma locking to outside world Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 03/15] HWPOISON: Add support for poison swap entries v2 Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 04/15] HWPOISON: Add new SIGBUS error codes for hardware poison signals Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 05/15] HWPOISON: Add basic support for poisoned pages in fault handler v3 Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 06/15] HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2 Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 07/15] HWPOISON: define VM_FAULT_HWPOISON to 0 when feature is disabled Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 08/15] HWPOISON: Use bitmask/action code for try_to_unmap behaviour Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 09/15] HWPOISON: Handle hardware poisoned pages in try_to_unmap Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 10/15] HWPOISON: check and isolate corrupted free pages v3 Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 11/15] HWPOISON: The high level memory error handler in the VM v8 Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-21  8:57   ` Andi Kleen
2009-06-21  8:57     ` Andi Kleen
2009-06-22  9:02     ` Wu Fengguang
2009-06-22  9:02       ` Wu Fengguang
2009-06-22  9:37     ` Wu Fengguang [this message]
2009-06-22  9:37       ` Wu Fengguang
2009-06-24  9:17     ` Hidehiro Kawai
2009-06-24  9:17       ` Hidehiro Kawai
2009-06-20  3:16 ` [PATCH 12/15] HWPOISON: per process early kill option prctl(PR_MEMORY_FAILURE_EARLY_KILL) Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-21  8:52   ` Andi Kleen
2009-06-21  8:52     ` Andi Kleen
2009-06-22  9:27     ` Wu Fengguang
2009-06-22  9:27       ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 13/15] HWPOISON: Add madvise() based injector for hardware poisoned pages v3 Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 14/15] HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang
2009-06-20  3:16 ` [PATCH 15/15] HWPOISON: FOR TESTING: Enable memory failure code unconditionally Wu Fengguang
2009-06-20  3:16   ` Wu Fengguang

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