linux-kernel - Re: [RESEND v2 PATCH 0/2] Bug fix in aio ring page migration

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Date:	Wed, 14 May 2014 09:13:15 +0800
From:	Gu Zheng <guz.fnst@...fujitsu.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	<stable@...r.kernel.org>, <viro@...iv.linux.org.uk>,
	<bcrl@...ck.org>, <jmoyer@...hat.com>, <kosaki.motohiro@...il.com>,
	<kosaki.motohiro@...fujitsu.com>, <isimatu.yasuaki@...fujitsu.com>,
	<linux-fsdevel@...r.kernel.org>, <linux-aio@...ck.org>,
	<linux-kernel@...r.kernel.org>, <miaox@...fujitsu.com>,
	tangchen <tangchen@...fujitsu.com>
Subject: Re: [RESEND v2 PATCH 0/2] Bug fix in aio ring page migration

Hi Greg,
Thanks for your attention on this thread.
On 05/14/2014 07:58 AM, Greg Kroah-Hartman wrote:

> On Thu, Mar 13, 2014 at 05:45:42PM +0800, Gu Zheng wrote:
>> This patchset has been applied to linux-next, and these problems also exist
>> in 3.12.y and 3.13.y stable tree.
>> So please merge this patchset to 3.12.y and 3.13.y stable tree.
>>
>> commit 692c9b8c5ee8d263bb8348171f0bebd3d84eb2c1
>> Author: Tang Chen <tangchen@...fujitsu.com>
>> Date:   Mon Mar 10 16:15:33 2014 +0800
>>
>>     aio, memory-hotplug: Fix confliction when migrating and accessing ring pages.
>>
>> commit e0f5e0add36d2e3c456cf2f4283673ed834b3c24
>> Author: Tang Chen <tangchen@...fujitsu.com>
>> Date:   Mon Mar 10 16:15:34 2014 +0800
>>
>>     aio, mem-hotplug: Add memory barrier to aio ring page migration.
>>
>> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/fs/aio.c?id=692c9b8c5ee8d263bb8348171f0bebd3d84eb2c1
>> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/fs/aio.c?id=e0f5e0add36d2e3c456cf2f4283673ed834b3c24
>>
>> https://lkml.org/lkml/2014/3/10/56
>> https://lkml.org/lkml/2014/3/10/58
> 
> I don't see these in Linus's tree, what happened?

These two patches were replaced by the better one from Benjamin, and it has been
merged into upstream.
commit fa8a53c39f3fdde98c9eace6a9b412143f0f6ed6
Author: Benjamin LaHaise <bcrl@...ck.org>
Date:   Fri Mar 28 10:14:45 2014 -0400

    aio: v4 ensure access to ctx->ring_pages is correctly serialised for migration
And I have already received the notify that it has been applied into stable tree.

Best regards,
Gu

> 
> thanks,
> 
> greg k-h
> 
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