Re: [Xen-users] guest video slow

[George Dunlap <dunlapg@xxxxxxxxx>]

On Wed, May 4, 2016 at 2:02 AM, Mike Wright <nobody@xxxxxxxxxxxxxxxxxxxx> wrote:
> On 05/03/2016 02:59 AM, George Dunlap wrote:
> <snip/>
>>
>> Hope that gives you some things to look at.
>
> Thanks George. It does.
>
> All records (and memories) of my fedora setup are long lost.
>
> Guest is PV.  All bridging, etc. is predefined in Dom0.  Not knowingly using
> any scripts, virt-, qemu-, etc. Everything is manual via "xl". Using
> xen-4.5-amd64 with ubuntu's kernel 3.19.0-16-generic.
>
> ### config
> name        = 'MIKE'
> kernel      = '/etc/xen/VMs/boot/vmlinuz-4.4.0-18-generic'
> initrd      = '/etc/xen/VMs/boot/initrd.img-4.4.0-18-generic'
> vcpus       = '3'
> memory      = '6144'
> root        = '/dev/xvda1 ro'
> disk        = [
>   'phy:/dev/VMs/MIKE,xvda1,w',
>   'phy:/dev/VMs/MIKEs,xvda2,w',
> ]
> vif         = [
>   'mac=00:16:3E:01:B3:11,bridge=LAN',
>   'mac=00:16:3E:09:47:C1,bridge=SND',
> ]
> vbf         = [ 'sdl=1,vnc=1,vncdisplay=0' ]

You still have "vbf" rather than "vfb" here.

> on_poweroff = 'destroy'
> on_reboot   = 'restart'
> on_crash    = 'restart'
>
> ### this process exists; I think it is started by xl when the guest is
> created:
>
> /usr/bin/qemu-system-i386 -xen-domid 0 -xen-attach -name dom0 -nographic -M
> xenpv -daemonize -monitor /dev/null -serial /dev/null -parallel /dev/null
> -pidfile /var/run/qemu-dom0.pid

No -- that process is started on behalf of dom0 during boot.  It's to
help dom0 mount guest filesystems for things like pygrub.

Unfortunately I'm not terribly familiar with the vfb path itself, and
I don't have a lot of time to look into it at the moment. :-/

 -George

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