[vfio-users] libvirt-3.0.0 from libvirt-2.4.0 breaks Windows VMs

[Leonhard Preis]

Hi!

Actually there is an ongoing thread about this in the archlinux Forum[1].  
It appears to affect primarily LVM backed VMs although the thread also  
links to this bug[2] which does not mention LVM at all.

In any case it’s quite astonishing that such a bug would make it into a  
major release. But that’s why we run Arch, right? To test stuff for the  
people with non-bleeding-edge distros …

Cheers,
Leonhard

[1] https://bbs.archlinux.org/viewtopic.php?id=222343
[2] https://bugzilla.redhat.com/show_bug.cgi?id=1413773

Am 26.01.2017, 18:49 Uhr, schrieb Anthony M de Beus  
<anthony.debeus at gmail.com>:

> Haven't seen mention of this elsewhere yet, not sure if this is the best
> place to post it.
>
> I just updated to libvirt-3.0.0-1 on Arch from libvirt-2.4.0-2 and my
> Windows VMs no longer start. Reverting to libvirt-2.4.0-2 reverses the
> problem.  The problem affects Windows 7 and XP, the XP machine doesn't
> have GPU passthrough.  A CAELinux VM still runs.  journalctl shows,
> under libvirtd 3.0.0
>
> Jan 26 06:46:35 bozo systemd[1]: Started Virtual Machine qemu-1-Windows7.
> Jan 26 06:46:35 bozo virtlogd[30871]: 2017-01-26 13:46:35.878+0000:
> 30871: info : libvirt version: 3.0.0
> Jan 26 06:46:35 bozo virtlogd[30871]: 2017-01-26 13:46:35.878+0000:
> 30871: info : hostname: bozo
> Jan 26 06:46:35 bozo virtlogd[30871]: 2017-01-26 13:46:35.878+0000:
> 30871: error : virNetSocketReadWire:1800 : End of file while reading
> data: Input/output error
> Jan 26 06:46:35 bozo virtlogd[30871]: 2017-01-26 13:46:35.880+0000:
> 30871: error : virNetSocketReadWire:1800 : End of file while reading
> data: Input/output error
>
> /var/log/libvirt/qemu/Windows7.log shows
>
> 2017-01-26 13:46:35.702+0000: starting up libvirt version: 3.0.0, qemu
> version: 2.8.0, hostname: bozo
> LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
> QEMU_AUDIO_DRV=spice /usr/sbin/qemu-system-x86_64 -name
> guest=Windows7,debug-threads=on -S -object
> secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-1-Wind$
> Domain id=1 is tainted: cdrom-passthrough
> libvirt:  error : libvirtd quit during handshake: Input/output error
> 2017-01-26 13:46:35.878+0000: shutting down, reason=failed
>
>
> Whereas under 2.4.0, journalctl shows
>
> bozo systemd[1]: Started Virtual Machine qemu-3-Windows7.
> Jan 26 10:28:07 bozo kernel: qemu-system-x86: sending ioctl 5326 to a
> partition!
> Jan 26 10:28:07 bozo dhcpcd[708]: vnet0: soliciting a DHCP lease
> ......bunch of normal vm assignments....
> Jan 26 10:28:11 bozo kernel: usb 4-1.8.4: reset high-speed USB device
> number 8 using ehci-pci
> Jan 26 10:28:11 bozo virtlogd[1512]: End of file while reading data:
> Input/output error
> Jan 26 10:28:12 bozo kernel: kvm: zapping shadow pages for mmio
> generation wraparound
> Jan 26 10:28:12 bozo kernel: kvm: zapping shadow pages for mmio
> generation wraparound
> Jan 26 10:28:14 bozo kernel: usb 4-1.2: reset low-speed USB device
> number 4 using ehci-pci
> ...bunch of normal vm assignments and synergy messages....
> 017-01-26T10:29:33] NOTE: client "penguin" has connected
> Jan 26 10:29:33 bozo synergys[1189]:
> /build/synergy/src/synergy-1.8.7-stable/src/lib/server/Server.cpp,337
> Jan 26 10:31:56 bozo synergys[1189]: [2017-01-26T10:31:56] NOTE: client
> "penguin" has disconnected
> Jan 26 10:31:56 bozo synergys[1189]:
> /build/synergy/src/synergy-1.8.7-stable/src/lib/server/ClientProxy1_0.cpp,213
>
> and /var/log/libvirt/qemu/Windows7.log shows
>
> 2017-01-24 17:34:33.446+0000: starting up libvirt version: 2.4.0, qemu
> version: 2.8.0, hostname: bozo
> LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
> QEMU_AUDIO_DRV=spice /usr/sbin/qemu-system-x86_64 -name
> guest=Windows7,debug-threads=on -S -object
> secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-1-Wind$
> Domain id=1 is tainted: cdrom-passthrough
> 2017-01-24T21:08:41.957097Z qemu-system-x86_64: terminating on signal 15
> from pid 889 (/usr/bin/libvirtd)
> 2017-01-24 21:08:43.686+0000: shutting down, reason=shutdown
>
>
> In summary, looks like a handshake error with the network in
> virNetSocketReadWire.  I found this
> https://www.redhat.com/archives/libvir-list/2016-October/msg00745.html,
> implementing a new libssh transport.
>
> Suggestions? Places to post this error other than here? I realize this
> isn't probably a vfio related bug.
>
>
>
>
>
>
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-- 
Mit freundlichen Grüßen // Avec mes meilleures salutations // Best Regards
Leonhard Preis