similar to: vhost-net requested but could not be initialized

Thanks Wangkai but libvirt infact pre-configures network tap devices and pre-opens /dev/vhost-net file and passes these to qemu as open, ready to use file descriptors. My issue is that my qemu requires that /dev/vhost-net directory is removed and it's kernel module be unloaded. Then it creates a vhost -net device using its own configuration. On 24 July 2014 07:35, Wangkai (Kevin,C)

​The qemu that I am using isn't modified at all. It's the VHOST drivers that are mounted elsewhere i.e., not on default /dev/vhost-net. Here is the command that I use to launch my qemu VM: qemu-system-x86_64 -cpu host -boot order=c -hda /root/Disks/ubuntu1.qcow2 -m 1024M -smp 2 --enable-kvm -name 'client 1' -nographic -vnc :2 -net none -no-reboot -mem-path /dev/hugepages

Currently in the VM XML, I am passing the following command line argument as a passthrough argument: -netdev type=tap,id=net1,script=no,downscript=no,ifname=port3,vhost=on -device virtio-net-pci,netdev=net1,mac=00:00:00:00:00:01,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off Is there another way to represent this in the XML file? maybe that may solve the problem. On 24 July 2014

On Thu, Jul 24, 2014 at 03:48:06PM +0500, Asadullah Hussain wrote: > Let me clarify my question, I am using unmodified stock qemu (1.4.0) and > only the location of vhost file descriptor is different from default (I > don't remove the default /dev/vhost-net directory) > > The VHOST file descriptor is present in "/dev/vhost-0" directory instead of > the default

Let me clarify my question, I am using unmodified stock qemu (1.4.0) and only the location of vhost file descriptor is different from default (I don't remove the default /dev/vhost-net directory) The VHOST file descriptor is present in "/dev/vhost-0" directory instead of the default "/dev/vhost-net". When I try to give vhostfd in the XML I get a different error:

For qemu, the default vhost drive file is “/dev/vhost-net”, when you configured vhost on. Give the command “modprobe vhost-net” to add host kernel support for vhost. This is cannot controlled by libvirt I think. Wangkai From: libvirt-users-bounces@redhat.com [mailto:libvirt-users-bounces@redhat.com] On Behalf Of Asadullah Hussain Sent: Thursday, July 24, 2014 12:43 AM To:

On 24 July 2014 15:52, Daniel P. Berrange <berrange@redhat.com> wrote: > On Thu, Jul 24, 2014 at 03:48:06PM +0500, Asadullah Hussain wrote: > > Let me clarify my question, I am using unmodified stock qemu (1.4.0) and > > only the location of vhost file descriptor is different from default (I > > don't remove the default /dev/vhost-net directory) > > > >

Hello, In my C++ code, I generate my own domain XML file and I use virDomainCreateXML or virDomainDefineXML to launch my qemu VM. However, when I get to check which commands are sent to the qemu commandline, I find that libvirt has added so many extra parameters to the ones I have already set. How can I prevent libvirt from adding any extra parameters to the ones I originally defined in the

On Mon, Oct 17, 2016 at 02:29:10PM +0200, Marina Danial wrote: >I have a predetermined set of commands that I want to launch qemu with: > >sudo `which qemu-system-x86_64` -m 4G $(IMAGE) -enable-kvm \ >-nographic \ >-net nic,model=virtio,netdev=net0,macaddr=$(MAC),vlan=0 \ >-netdev tap,id=net0,ifname=tap01,vhost=on,script=no,downscript=no \ >-net

On Wed, Mar 19, 2014 at 05:17:52PM +0500, Asadullah Hussain wrote: > Guys thanks a lot for taking the time out to reply, Although adding the > $PATH & symbolic link methods both solved the "No hypervisor found" error > on virt-manager but when I try to create a VM using the wizard it says: > > "No hypervisor options were found for this connection" > >

Hello, I am trying run a simple VM (qemu1.4.2) on RHEL 6.5 through libvirt (0.10). virsh create throws the error: *​error: Failed to create domain from vm1.xml* *error: internal error process exited while connecting to monitor:*​ The libvirt log for VM shows: *libvir: error : cannot execute binary /usr/bin/qemu-system-x86_64: Permission denied* ​I am running VM as root and all disk

Hello, I have a custom QEMU which requires some non-standard command line arguments to launch a VM. e.g., "--proc-type=secondary" option is always required to launch a QEMU VM. To launch the VM through libvirt (virsh) "How do I specify these non-standard options in XML? OR if thats not possible ,Can you guide me at which point (code file) libvirt converts the XML to QEMU command

On Tue, Mar 04, 2014 at 02:09:19PM -0700, Eric Blake wrote: > On 03/04/2014 05:12 AM, Asadullah Hussain wrote: > > Hello I have manually compiled a customized qemu (1.4.0) which runs fine on > > its own (create VM etc) but I want to access this qemu through libvirt > > (virt-manager, virsh etc). > > > > But the libvirt driver only looks into "/usr/bin"

Hello I have manually compiled a customized qemu (1.4.0) which runs fine on its own (create VM etc) but I want to access this qemu through libvirt (virt-manager, virsh etc). But the libvirt driver only looks into "/usr/bin" for qemu binaries, how can I tell libvirt to connect to my qemu which is placed at "/home/user/qemu" directory. -- Asadullah Hussain

The qemu binary is accessible as I can create VM through command line. That is why I thought it may be a libvirt issue. I have also contacted Red Hat support and will post my findings here if the issue is resolved. On 23 April 2014 17:16, Eric Blake <eblake@redhat.com> wrote: > On 04/23/2014 05:44 AM, Asadullah Hussain wrote: > > Hello, > > > > I am trying run a

There are a couple of problems with passthrough qemu: 1. virsh version/capabilities command executes "qemu -help" but this gives an error in my case because my customized qemu has to receive mandatory non-standard parameters "qemu -c -n -- -help". 2. Similarly when passing arguments as passthrough in a VMs XML. How can I make sure that these non-standard arguments are passed

Hi all, When I defined a network use the host bridge "virbr1" an error occurred : "libvir: error : Unable to create bridge virbr1: File exists" But how can I define this network use the host bridge "virbr1" ? <network> <name>def1</name> <bridge name='virbr1'/> <forward mode='nat'> <interface dev='eth0'/>

Hello all: This seires is an update of last version of multiqueue support to add multiqueue capability to both tap and virtio-net. Some kinds of tap backends has (macvatp in linux) or would (tap) support multiqueue. In such kind of tap backend, each file descriptor of a tap is a qeueu and ioctls were prodived to attach an exist tap file descriptor to the tun/tap device. So the patch let qemu to

Hello all: This seires is an update of last version of multiqueue support to add multiqueue capability to both tap and virtio-net. Some kinds of tap backends has (macvatp in linux) or would (tap) support multiqueue. In such kind of tap backend, each file descriptor of a tap is a qeueu and ioctls were prodived to attach an exist tap file descriptor to the tun/tap device. So the patch let qemu to

Hello all: This seires is an update of last version of multiqueue support to add multiqueue capability to both tap and virtio-net. Some kinds of tap backends has (macvatp in linux) or would (tap) support multiqueue. In such kind of tap backend, each file descriptor of a tap is a qeueu and ioctls were prodived to attach an exist tap file descriptor to the tun/tap device. So the patch let qemu to