motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-01 23:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

vhost: multiqueue support

Browse source 
This patch lets vhost support multiqueue. The idea is simple, just launching
multiple threads of vhost and let each of vhost thread processing a subset of
the virtqueues of the device. After this change each emulated device can have
multiple vhost threads as its backend.

To do this, a virtqueue index were introduced to record to first virtqueue that
will be handled by this vhost_net device. Based on this and nvqs, vhost could
calculate its relative index to setup vhost_net device.

Since we may have many vhost/net devices for a virtio-net device. The setting of
guest notifiers were moved out of the starting/stopping of a specific vhost
thread. The vhost_net_{start|stop}() were renamed to
vhost_net_{start|stop}_one(), and a new vhost_net_{start|stop}() were introduced
to configure the guest notifiers and start/stop all vhost/vhost_net devices.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jason Wang 2013-01-30 19:12:35 +08:00 • committed by Anthony Liguori
parent 264986e2c8
commit a9f98bb5eb
5 changed files with 120 additions and 58 deletions
Download patch file Download diff file Expand all files Collapse all files

4
hw/virtio-net.c
View file

@ -130,14 +130,14 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
return;
}
n->vhost_started = 1;
r = vhost_net_start(tap_get_vhost_net(nc->peer), &n->vdev);
r = vhost_net_start(&n->vdev, nc, 1);
if (r < 0) {
error_report("unable to start vhost net: %d: "
"falling back on userspace virtio", -r);
n->vhost_started = 0;
}
} else {
vhost_net_stop(tap_get_vhost_net(nc->peer), &n->vdev);
vhost_net_stop(&n->vdev, nc, 1);
n->vhost_started = 0;
}
}