new config option:
iothread: 1|0
This enable iothread/dataplane support, to improve io performance on fast storages
Currently block jobs don't work yet, it's planned for qemu 2.2.
So it's better to not expose yet this option in gui.
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
the machine option is write in the snapshot (ok), but also in the running config (bad)
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>
we should push to $devices array instead $cmd array,
because pci bridges need to be create before spice devices
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
multifunction device should be define without the .function
hostpci0: 00:00
example
-------
if 00:00.0
00:00.1
00:00.2
exists,
then we generate the multifunction devices
-device (pci-assign|vfio-pci),host=00:00.0,id=hostpci0.0,bus=...,addr=0x0.0,multifunction=on
-device (pci-assign|vfio-pci),host=00:00.1,id=hostpci0.1,bus=...,addr=0x0.1
-device (pci-assign|vfio-pci),host=00:00.2,id=hostpci0.2,bus=...,addr=0x0.2
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
hostpci0: .....,x-vga=on,pcie=1
x-vga require kernel 3.10 with vfio-vga support enable
if x-vga=on, we force vfio-pci device
pcie=1 choose the pciexpress bus (need q35 machine model)
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
q35 use pcie.0 root by default. so currently we can't start machine model q35.
we need to add 3 pci-bridge pci.0, pci.1, pci.2, to handle our devices.
pcie.0 does not support hotplug. so pci-bridge are defined at startup.
I use an pve-q35.cfg (mostly the same than q35-chipset.cfg from qemu docs).
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
this a new option queue=(\d+) to net interface
Allow to use more than 1 cpu for network stream, so this can improve network bandwidth,
when vhost-net cpu is the bottleneck
http://www.linux-kvm.org/page/Multiqueue#Enable_MQ_feature
-netdev tap,vhost=on,queues=N -device virtio-net-pci,mq=on,vectors=2N+2
host requirement
----------------
this require host kernel >= 3.8 (or qemu die at start)
linux guest requirement
-----------------------
kernel >= 3.8
manual enabling multiqueue
windows guest requierement
--------------------------
recent virtio-net driver
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
We simply add option iscsi if we have an initiator name. So we
never add this option multiple times, and it works with hotplug
in case someone plugs an 'iscsi:' drive later.
enable check if host support all cpu flags configured for the guests
this avoid some bad setup like Opteron vcpu on a intel host for example,
and avoid some bad live migrations
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
