Bug 804028

Summary: Cannot roundtrip blkio parameters due to broken deviceWeight handling
Product: Red Hat Enterprise Linux 6 Reporter: Daniel Berrangé <berrange>
Component: libvirtAssignee: Daniel Veillard <veillard>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 6.3CC: acathrow, ajia, dallan, dyuan, hbrock, mshao, mzhan, rwu, veillard
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: libvirt-0.9.10-6.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 800734 Environment:
Last Closed: 2012-06-20 06:50:31 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 800734    

Description Daniel Berrangé 2012-03-16 11:10:09 UTC 
+++ This bug was initially created as a clone of Bug #800734 +++

Description of problem:


Version-Release number of selected component (if applicable):


How reproducible:
everytimes

Steps to Reproduce:
Make sure you have a running guest named "vr-rhel6-x86_64-kvm"
1. prepare set_blkio.pl as follows:
# cat set_blkio.pl 
#!/usr/bin/perl
use warnings;
use strict;
use Sys::Virt;

my $uri = "qemu:///system";
my $domname = "vr-rhel6-x86_64-kvm";
my $flags = 0;

my $con = Sys::Virt->new(address => $uri, readonly => 0);
my $dom = $con->get_domain_by_name($domname);
my $weight = 600;

my %blkio = (Sys::Virt::Domain::BLKIO_WEIGHT => $weight);
$dom->set_blkio_parameters(\%blkio);

2. Run set_blkio.pl:
# perl set_blkio.pl 
libvirt error code: 8, message: invalid argument: unable to parse
  


This error message is because virDomainSetBlkioParameters is rejecting the deviceWeight "" value returned by virDomainGetBlkioParameters
Comment 1 Daniel Berrangé 2012-03-16 11:11:06 UTC 
Fix upstream:

https://www.redhat.com/archives/libvir-list/2012-March/msg00727.html
Comment 7 errata-xmlrpc 2012-06-20 06:50:31 UTC 
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