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

From Boris Ostrovsky <boris.ostrovsky@oracle.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2] xen/gntdev: Use mempolicy instead of VM_IO flag to avoid NUMA balancing
Date 2016-11-17 18:40 +0100
Message-ID <sEyPg-3IB-15@gated-at.bofh.it> (permalink)
References <sEcvo-609-31@gated-at.bofh.it> <sEt3b-8sS-3@gated-at.bofh.it> <sEyme-3v8-87@gated-at.bofh.it> <sEyme-3v8-85@gated-at.bofh.it>
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On 11/17/2016 11:01 AM, Olaf Hering wrote:
> On Thu, Nov 17, Boris Ostrovsky wrote:
>
>> On 11/17/2016 06:28 AM, Olaf Hering wrote:
>>> ERROR: "__mpol_dup" [drivers/xen/xen-gntdev.ko] undefined!
>>> ERROR: "get_task_policy" [drivers/xen/xen-gntdev.ko] undefined!
>> I just built 4.4.11 with this patch applied and haven't had any problems.
> Are these functions exported? How would the driver module call into the
> core kernel? Maybe the added functionality should be provided by an
> exported helper function.

You are right --- I didn't realize was building with grant device
built-in. So yes, this needs to be fixed.

-boris

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Thread

[PATCH v2] xen/gntdev: Use mempolicy instead of VM_IO flag to avoid NUMA balancing Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-11-16 18:50 +0100
  Re: [PATCH v2] xen/gntdev: Use mempolicy instead of VM_IO flag to  avoid NUMA balancing Olaf Hering <olaf@aepfle.de> - 2016-11-17 12:30 +0100
    Re: [PATCH v2] xen/gntdev: Use mempolicy instead of VM_IO flag to  avoid NUMA balancing Olaf Hering <olaf@aepfle.de> - 2016-11-17 18:10 +0100
      Re: [PATCH v2] xen/gntdev: Use mempolicy instead of VM_IO flag to  avoid NUMA balancing Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-11-17 18:40 +0100
    Re: [PATCH v2] xen/gntdev: Use mempolicy instead of VM_IO flag to  avoid NUMA balancing Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-11-17 18:30 +0100

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