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+++ This bug was initially created as a clone of Bug #723540 +++
Created attachment 514014[details]
The <host> part of rhe "virsh capabilities" output
Description of problem:
cpu-compare fails to compare host CPU with any xml configuration file. Attached are the <host> part of the "virsh capabilities" output and a dumpxml of a running vm.
Version-Release number of selected component (if applicable):
Compiled from a git snapshot of the 0.9.3, sha1sum is
11f94b9213440ac5b06161f8e4d07955e481ee81 libvirt-git-snapshot.tar.gz
How reproducible:
I didn't get it working
Steps to Reproduce:
1.virsh capabilities > capabilities.xml
2.virsh dumpxml VirtualTest > VirtualTest.xml
3.virsh cpu-compare capabilities.xml
Or
3.virsh cpu-compare VirtualTest.xml
Actual results:
Error :Failed to compare host CPU with input.xml
Error :internal error XML does not contain expected 'cpu' element
Expected results:
A comparison...
Additional info:
In the xml file, the cpu flag contains a "match" field. This could have lead to the error. However, in the capabilities, the cpu flag is a pure <cpu> </cpu> flag.
The error has been introduced with this patch :
http://permalink.gmane.org/gmane.comp.emulators.libvirt/23032
The result has been obtained on ubuntu 11.04 64bits on a Xeon E5520
Running qemu 0.14.0
Kind regards
--- Additional comment from eton_vser on 2011-07-25 04:19:28 EDT ---
I finally understood it...
It's just that cpu-compare needs the <cpu> flag to be the root flag of the document...
Couldn't we change it so we may compare the output of a dumpxml to a host cpu ?
Kind regards
Etienne
--- Additional comment from jdenemar on 2011-08-03 10:59:13 EDT ---
This seems like a useful addition, esp. considering that virsh cpu-baseline supports this.
fixed with upstream commit:
commit 882e768ef0b2b11feeeab7fda0c5b5a3224ed57b
Author: Peter Krempa <pkrempa>
AuthorDate: Thu Sep 15 09:18:04 2011 +0200
virsh: Allow using domain and capabilities XMLs with cpu-compare
This patch adds extraction of the <cpu> element from capabilities and
domain definition XML documents to improve user experience.
Reproduce this bug with libvirt-0.9.4-23.el6.x86_64.
Verified this bug with libvirt-0.9.9-1.el6.
Steps:
1. Compare with capabilities file
# virsh capabilities > capabilities2.xml
# virsh cpu-compare capabilities2.xml
Host CPU is a superset of CPU described in capabilities2.xml
2. Compare with guest xml which has cpu elements
# virsh dumpxml guest > rhel62.xml
# cat rhel62.xml
...
<cpu match='exact'>
<model>core2duo</model>
<vendor>Intel</vendor>
<topology sockets='1' cores='2' threads='1'/>
<feature policy='disable' name='lahf_lm'/>
</cpu>
...
# virsh cpu-compare rhel62.xml
Host CPU is a superset of CPU described in rhel62.xml
3. Compare with guest xml which has no cpu elements
# virsh cpu-compare rhel62.xml
error: File 'rhel62.xml' does not contain a <cpu> element or is not a valid domain or capabilities XML
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
http://rhn.redhat.com/errata/RHSA-2012-0748.html