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

[Tang Chen <tangchen@cn.fujitsu.com>]

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