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From: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org,
	Satoshi OSHIMA <satoshi.oshima.fk@hitachi.com>,
	Taketoshi Sakuraba <taketoshi.sakuraba.hc@hitachi.com>
Subject: Re: [PATCH] [0/16] POISON: Intro
Date: Tue, 26 May 2009 21:50:18 +0900	[thread overview]
Message-ID: <4A1BE58A.9060708@hitachi.com> (raw)
In-Reply-To: <20090407509.382219156@firstfloor.org>

Hi all,
(I'm sorry for the very late comment.)

Andi Kleen wrote:

> Upcoming Intel CPUs have support for recovering from some memory errors. This
> requires the OS to declare a page "poisoned", kill the processes associated
> with it and avoid using it in the future. This patchkit implements
> the necessary infrastructure in the VM.

I think this patch set is a great step to get the Linux system
reliable close to mainframe.  I really appreciate your work.

I believe people concerning high reliable system are expecting
this kind of functionality.
But I wonder why this patch set (including former MCE improvements
patches) has not been merged into any subsystem trees yet.
What is the problem?  Because of the deadlock bug and the ref counter
problem?  Or are we waiting for 32bit unification to complete?
If so, I'd like to try to narrow down the problems or review
patches (although I'm afraid I'm not so skillful).

BTW, I looked over this patch set, and I couldn't
find any problems except for one minor point.  I'll post
a comment about it later.  It is very late, but better than nothing.

Regards,
-- 
Hidehiro Kawai
Hitachi, Systems Development Laboratory
Linux Technology Center

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  parent reply	other threads:[~2009-05-26 12:50 UTC|newest]

Thread overview: 75+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-07 15:09 [PATCH] [0/16] POISON: Intro Andi Kleen
2009-04-07 15:09 ` [PATCH] [1/16] POISON: Add support for high priority work items Andi Kleen
2009-04-07 15:09 ` [PATCH] [2/16] POISON: Add page flag for poisoned pages Andi Kleen
2009-04-07 21:07   ` Christoph Lameter
2009-04-08  0:29   ` Russ Anderson
2009-04-08  6:26     ` Andi Kleen
2009-04-08  5:14   ` Andrew Morton
2009-04-08  6:24     ` Andi Kleen
2009-04-08  7:00       ` Andrew Morton
2009-04-08  9:38         ` Andi Kleen
2009-04-07 15:09 ` [PATCH] [3/16] POISON: Handle poisoned pages in page free Andi Kleen
2009-04-07 23:21   ` Minchan Kim
2009-04-08  6:51     ` Andi Kleen
2009-04-08  7:39       ` Minchan Kim
2009-04-08  9:41         ` Andi Kleen
2009-04-08 10:05           ` Minchan Kim
2009-04-07 15:10 ` [PATCH] [4/16] POISON: Export some rmap vma locking to outside world Andi Kleen
2009-04-07 15:10 ` [PATCH] [5/16] POISON: Add support for poison swap entries Andi Kleen
2009-04-07 21:11   ` Christoph Lameter
2009-04-07 21:56     ` Andi Kleen
2009-04-07 21:56       ` Christoph Lameter
2009-04-07 22:25         ` Andi Kleen
2009-04-07 15:10 ` [PATCH] [6/16] POISON: Add new SIGBUS error codes for poison signals Andi Kleen
2009-04-07 15:10 ` [PATCH] [7/16] POISON: Add basic support for poisoned pages in fault handler Andi Kleen
2009-05-26 12:55   ` Hidehiro Kawai
2009-05-26 13:18     ` Andi Kleen
2009-04-07 15:10 ` [PATCH] [8/16] POISON: Add various poison checks in mm/memory.c Andi Kleen
2009-04-07 19:03   ` Johannes Weiner
2009-04-07 19:31     ` Andi Kleen
2009-04-07 20:17       ` Johannes Weiner
2009-04-07 20:24         ` Andi Kleen
2009-04-07 20:36           ` Johannes Weiner
2009-04-07 15:10 ` [PATCH] [9/16] POISON: x86: Add VM_FAULT_POISON handling to x86 page fault handler Andi Kleen
2009-04-07 15:10 ` [PATCH] [10/16] POISON: Use bitmask/action code for try_to_unmap behaviour Andi Kleen
2009-04-07 21:19   ` Christoph Lameter
2009-04-07 21:59     ` Andi Kleen
2009-04-07 22:04       ` Christoph Lameter
2009-04-07 22:35         ` Andi Kleen
2009-04-07 15:10 ` [PATCH] [11/16] POISON: Handle poisoned pages in try_to_unmap Andi Kleen
2009-04-07 15:10 ` [PATCH] [12/16] POISON: Handle poisoned pages in set_page_dirty() Andi Kleen
2009-04-07 15:10 ` [PATCH] [13/16] POISON: The high level memory error handler in the VM Andi Kleen
2009-04-07 16:03   ` Rik van Riel
2009-04-07 16:30     ` Andi Kleen
2009-04-07 18:51   ` Johannes Weiner
2009-04-07 19:40     ` Andi Kleen
2009-04-08 17:03   ` Chris Mason
2009-04-09  7:29     ` Andi Kleen
2009-04-09  7:58       ` [PATCH] [13/16] POISON: The high level memory error handler in the VM II Andi Kleen
2009-04-09 13:30         ` Chris Mason
2009-04-09 14:02           ` Andi Kleen
2009-04-09 14:37             ` Chris Mason
2009-04-09 14:57               ` Andi Kleen
2009-04-29  8:16               ` Wu Fengguang
2009-04-29  8:21                 ` btrfs BUG on creating huge sparse file Wu Fengguang
2009-04-29 11:40                   ` Chris Mason
2009-04-29 11:45                     ` Wu Fengguang
2009-04-29  8:36                 ` [PATCH] [13/16] POISON: The high level memory error handler in the VM II Andi Kleen
2009-04-29  9:05                   ` Wu Fengguang
2009-04-29 11:27                     ` Chris Mason
2009-04-07 15:10 ` [PATCH] [14/16] x86: MCE: Rename mce_notify_user to mce_notify_irq Andi Kleen
2009-04-07 15:10 ` [PATCH] [15/16] x86: MCE: Support action-optional machine checks Andi Kleen
2009-04-07 15:10 ` [PATCH] [16/16] POISON: Add madvise() based injector for poisoned data Andi Kleen
2009-04-07 19:13 ` [PATCH] [0/16] POISON: Intro Robin Holt
2009-04-07 19:38   ` Andi Kleen
2009-04-08  5:15 ` Andrew Morton
2009-04-08  6:15   ` Andi Kleen
2009-04-08 17:29     ` Roland Dreier
2009-04-09  7:22       ` Andi Kleen
2009-04-08  5:47 ` Andrew Morton
2009-04-08  6:21   ` Andi Kleen
2009-04-13 13:18   ` Wu Fengguang
2009-05-26 12:50 ` Hidehiro Kawai [this message]
2009-05-26 13:29   ` Andi Kleen
2009-05-28  4:37     ` Hidehiro Kawai
2009-05-28  8:00       ` Andi Kleen

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