[3.13.y.z] Suggested cherry-pick to fix Xen PV clashing with NUMA hinting

[Kamal Mostafa]

On Thu, 2014-05-08 at 21:42 -0500, Stefan Bader wrote:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1313450
> 
> PV Xen guests still/again suffer from unfortunate overload of PTE flags. A first
> attempt to fix this has been reverted since it broke migration.
> Upstream I found that the following patch seems to address this. It is tagged
> for stable and comments in the bug report say a mainline kernel that would
> include this appears to fix the problem. Since it is claimed to be stable
> material anyway I was a bit lazy and did not do an individual test kernel. Maybe
> its in some queue already anyway.
> 
> commit 29c7787075c92ca8af353acd5301481e6f37082f
> Author: Mel Gorman <mgorman at suse.de>
>     mm: use paravirt friendly ops for NUMA hinting ptes
> 
> If it gets picked for 3.13, we could probably add a bug link for above bug...
> 
> -Stefan
> 

This Cc: stable patch looks fine to me.  I'll queue it up for the next
3.13-stable and add your BugLink line.  Thanks, Stefan!

 -Kamal

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