[RESEND v2 PATCH 0/2] Bug fix in aio ring page migration

[Tang Chen]

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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