linux-kernel - [PATCH 0/2] Bug fix in aio ring page migration.

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Message-Id: <1393497616-16428-1-git-send-email-tangchen@cn.fujitsu.com>
Date:	Thu, 27 Feb 2014 18:40:14 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	viro@...iv.linux.org.uk, bcrl@...ck.org, jmoyer@...hat.com,
	kosaki.motohiro@...il.com, kosaki.motohiro@...fujitsu.com,
	isimatu.yasuaki@...fujitsu.com, guz.fnst@...fujitsu.com
Cc:	linux-fsdevel@...r.kernel.org, linux-aio@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] Bug fix in aio ring page migration.

This patch-set fixes the following two problems:

1. Need to use ctx->completion_lock to protect ring pages 
   from being mis-written while migration.

2. Need memory barrier to ensure memory copy is done before 
   ctx->ring_pages[] is updated.

NOTE: AIO ring page migration was implemented since Linux 3.12.
      So we need to merge these two patches into 3.12 stable tree.  


Tang Chen (2):
  aio, memory-hotplug: Fix confliction when migrating and accessing ring
    pages.
  aio, mem-hotplug: Add memory barrier to aio ring page migration.

 fs/aio.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

-- 
1.8.3.1

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