Re: [PATCH v2] xen/gntdev: Use mempolicy instead of VM_IO flag to avoid NUMA balancing

[Olaf Hering]

On Wed, Nov 16, Boris Ostrovsky wrote:

> Unfortunately I haven't been able to trigger NUMA balancing
> so while I tested this in general I am not sure I actually
> exercised the code path.

Thanks for the patch!

Would be nice to actually test the code path which caused the initial
addition of VM_IO. I think I lack the hardware to excersise them.


In my 4.4 based sources I get the following unresolved symbols. If that
happens to work in mainline the failures should at least be considered
during backporting of this proposed patch to the stable trees.

ERROR: "__mpol_dup" [drivers/xen/xen-gntdev.ko] undefined!
ERROR: "get_task_policy" [drivers/xen/xen-gntdev.ko] undefined!

Appearently these symbols lack just an EXPORT_SYMBOL_GPL.

Olaf

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