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[Qemu-devel] vhost-net issue with multiples interfaces using MQ
From: |
William Dauchy |
Subject: |
[Qemu-devel] vhost-net issue with multiples interfaces using MQ |
Date: |
Mon, 18 Aug 2014 13:42:23 +0200 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
Hello,
Using qemu2.1.0, a linux v3.14.X x86_64 as host and a linux v3.12.X x86_64 as
guest
I'm starting a VM with these network interfaces:
[netdev "vifA.0"]
type = "tap"
vhost = "on"
ifname = "vifA.0"
downscript = "no"
script = "no"
queues = "2"
[device "vifA.0"]
driver = "virtio-net-pci"
netdev = "vifA.0"
mac = "00:16:3e:1a:4e:11"
mq = "on"
vectors = "5"
(and same config for two other interfaces but with a different MAC address)
In the error message I'm getting during startup:
unable to start vhost net: 95: falling back on userspace virtio
I saw that it's failing in `vhost_dev_start` where `vhost_dev_set_features` is
returning an error.
r = vhost_dev_set_features(hdev, hdev->log_enabled);
I'm hitting the issue starting from three interfaces, i.e no problem with one
or two.
I also don't have the issue with disabling multi queue.
Am I wrong on something? What can I do to help debug this situation?
Regards,
--
William
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William Dauchy <=