https://github.com/torvalds/linux
Revision 9c17d96500f78d7ecdb71ca6942830158bc75a2b authored by Boris Ostrovsky on 10 November 2015, 20:10:33 UTC, committed by David Vrabel on 26 November 2015, 17:47:35 UTC
Doing so will cause the grant to be unmapped and then, during
fault handling, the fault to be mistakenly treated as NUMA hint
fault.

In addition, even if those maps could partcipate in NUMA
balancing, it wouldn't provide any benefit since we are unable
to determine physical page's node (even if/when VNUMA is
implemented).

Marking grant maps' VMAs as VM_IO will exclude them from being
part of NUMA balancing.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
1 parent abed7d0
History
Tip revision: 9c17d96500f78d7ecdb71ca6942830158bc75a2b authored by Boris Ostrovsky on 10 November 2015, 20:10:33 UTC
xen/gntdev: Grant maps should not be subject to NUMA balancing
Tip revision: 9c17d96
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