linux-kernel - Re: [PATCH v2] xen/gntdev: Use mempolicy instead of VM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Thu, 17 Nov 2016 11:09:22 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Olaf Hering <olaf@...fle.de>
Cc:     david.vrabel@...rix.com, jgross@...e.com,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] xen/gntdev: Use mempolicy instead of VM_IO flag to
 avoid NUMA balancing

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



Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)