Bug 809613

Summary: Undefined error when saving state of a VM with USB devices assigned
Product: Red Hat Enterprise Linux 6 Reporter: 6ax
Component: qemu-kvmAssignee: Gerd Hoffmann <kraxel>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: low Docs Contact:
Priority: unspecified    
Version: 6.2CC: acathrow, ajia, areis, bsarathy, dallan, dyasny, dyuan, hyao, juzhang, mkenneth, mzhan, rwu, virt-maint, weizhan
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-04-17 13:11:08 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Attachments:
Description Flags
As you requested: /var/log/libvirt/qemu/winsrv.log
none
VM config winsrv.xml none

Description 6ax 2012-04-03 19:47:39 UTC
The command:
   virsh save winsrv testsavefile 
get an error like: QEMU «migrate»: An undefined error has ocurred

if the config file to remove the block containing:

  <hostdev mode='subsystem' type='usb' managed='yes'>
       <source>
         <address bus='2' device='3'/>
       </ source>
     </ hostdev>

and then:
virsh save winsrv testsavefile

saves the file without errors.

libvirt-python-0.9.4-23.el6_2.7.x86_64
libvirt-client-0.9.4-23.el6_2.7.x86_64
libvirt-0.9.4-23.el6_2.7.x86_64
qemu-kvm-0.12.1.2-2.209.el6_2.4.x86_64

Comment 2 Jiri Denemark 2012-04-05 12:40:44 UTC
The unhelpful error message is coming from qemu. I'm not sure it makes any sense to save/restore a domain with host devices assigned (I'm afraid they the devices will be in different internal state when the domain is resumed) but I will reassign this to qemu-kvm for now to check what's going on...

Could you attach /var/log/libvirt/qemu/winsrv.log file, which contains the command line qemu-kvm was started with and hopefully also some more messages from qemu.

Comment 3 6ax 2012-04-05 12:57:01 UTC
Created attachment 575400 [details]
As you requested: /var/log/libvirt/qemu/winsrv.log

Comment 4 6ax 2012-04-05 13:01:39 UTC
Created attachment 575402 [details]
VM config winsrv.xml

Comment 5 Ademar Reis 2012-04-17 13:11:08 UTC
save/restore of domains with assigned devices is not supported. The error message is not friendly, but this is not critical and has been improved on upstream (so RHEL7 will have it right).

Closing bug as deferred because the "undefined error" will be fixed in RHEL7 (although the use case will still be invalid).

Comment 6 Gerd Hoffmann 2013-04-15 09:16:04 UTC

*** This bug has been marked as a duplicate of bug 805172 ***