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Re: [Qemu-devel] [PATCH v3 for-1.7] rdma: rename 'x-rdma' => 'rdma'
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH v3 for-1.7] rdma: rename 'x-rdma' => 'rdma' |
Date: |
Fri, 15 Nov 2013 12:25:30 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0 |
On 11/15/2013 10:40 AM, Michael R. Hines wrote:
>
> This is unrelated to RDMA - accessing the /dev/infiniband
> device nodes is already supported by libvirt my modifying
> the configuration file in /etc and that works just fine.
http://wiki.qemu.org/Features/RDMALiveMigration states that you modify
the .conf file to expose /dev/infiniband/rdma_cm and friends. Are all
of these devices read/write accessible to non-root? Or is there going
to be a problem if using user="qemu" group="qemu"? (That is, merely
exposing the devices through cgroup device ACL checking may be
insufficient if you can't access the devices when not running root/root).
Libvirt can be patched so that the .conf file does not have to be edited
(ie. change the defaults so that if cgroup_device_acl is not present in
the conf file, the defaults could still let a domainaccess the
/dev/infiniband devices).
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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