[libvirt] Libvirt multi queue support

[Naor Shlomo]

Hi Michal

First of all I want to let you know that I really appreciate your guidance.
Second thing, after I successfully installed the kernel headers I was able to compile libvirt again, this time it let me start the Guest with queues='5'
The Guest runs Kernel 3.9.7 but for some reason virtio_has_feature(vdev, VIRTIO_NET_F_MQ) returns false for multi queue.

Could you please tell me what am I missing?

Thanks,
Naor

-----Original Message-----
From: Michal Privoznik [mailto:mprivozn at redhat.com] 
Sent: Thursday, August 29, 2013 10:13 AM
To: Naor Shlomo
Cc: libvir-list at redhat.com
Subject: Re: [libvirt] Libvirt multi queue support

On 29.08.2013 08:55, Naor Shlomo wrote:
> How odd.
> 
> The Kernel is the first thing I upgraded, here's the output of "uname -r":
> 3.10.9
> 
> I searched for IFF_MULTI_QUEUE in /usr/include/linux/if_tun.h and indeed it wasn't there.
> I believe Kernel 3.10 should support the Multi Queue, do I need to recompile it? maybe change its config file?

You shouldn't need to enable anything in the .config. However, you may need to update the linux-headers if you're building the libvirt on your own. There's a build-time check for IFF_MULTI_QUEUE.

Michal