Re: [Xen-devel] [RFC PATCH 0/2] x86: fix Xen PV regression caused by NUMA page migration

[David Sutton <kantras@xxxxxxxxx>]

David,

David Vrabel <david.vrabel <at> citrix.com> writes:

> 
> This series should properly fix the Xen PV guest regression introduced
> by 1667918b6483 (mm: numa: clear numa hinting information on
> mprotect).  The previous fix a9c8e4beeeb6 (xen: properly account for
> _PAGE_NUMA during xen pte translations) breaks save/restore
> (migration) and needs to be reverted.
> 
> I've only given this series a minimal amount of testing and would
> appreciate testing by someone who experienced/reproduced the original
> regression.
>
I just upgraded to the Archlinux linux 3.14.1-1 packages and it started to
show the same symptoms as before the original patch was applied (the key one
I noticed being major instability running firefox under dom0. I then applied
the 2nd patch in this set and recompiled; initial testing (doing things
which would almost certainly cause the issue to trigger, such as viewing a
youtube video through firefox) indicated that the patch is working as I
haven't been able to trigger the bug yet.
> 
> David
> 
Regards,

  David




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