linux-kernel - [V2 PATCH 0/2] Bug fix in aio ring page migration

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Message-ID: <531D4DFA.4000809@cn.fujitsu.com>
Date:	Mon, 10 Mar 2014 13:30:34 +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, Miao Xie <miaox@...fujitsu.com>
Subject: [V2 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 |   42 ++++++++++++++++++++++++++++++++++++++++++
  1 files changed, 42 insertions(+), 0 deletions(-)

-- 
1.7.7
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