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Bug 852260

Summary: AFFECT_CURRENT flag does not work well in set_scheduler_parameters when domain is shutoff
Product: Red Hat Enterprise Linux 6 Reporter: weizhang <weizhan>
Component: libvirtAssignee: Daniel Berrangé <berrange>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: low    
Version: 6.3CC: acathrow, ajia, berrange, dallan, dyasny, dyuan, mzhan
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: libvirt-0.10.2-3.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-02-21 07:22:21 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:
Embargoed:

Description weizhang 2012-08-28 03:44:13 UTC
Description of problem:
ith flag Sys::Virt::Domain::AFFECT_CURRENT, set_scheduler_parameters can not work well when domain is shutoff

Version-Release number of selected component (if applicable):
perl-Sys-Virt-0.9.10-4.el6.x86_64
libvirt-0.10.0-0rc1.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. # cat perl-test.pl
#!/usr/bin/perl
use warnings;
use strict;
use Sys::Virt;

my $uri = "qemu:///system";
my $domname = "guest2";
my $con = Sys::Virt->new(address => $uri, readonly => 0);
my $dom = $con->get_domain_by_name($domname);
my %sched_param = (Sys::Virt::Domain::SCHEDULER_CPU_SHARES=>1);
$dom->set_scheduler_parameters(\%sched_param, Sys::Virt::Domain::AFFECT_CURRENT);

2. Destroy domain guest2
3. Run # perl perl-test.pl

  
Actual results:
report error
libvirt error code: 55, message: Requested operation is not valid: domain is not running


Expected results:
Should work without error

Additional info:
When domain is shutoff, virsh command works well
# virsh schedinfo guest2 --current cpu_shares=1
Scheduler      : posix
cpu_shares     : 1
vcpu_period    : 0
vcpu_quota     : 0
emulator_period: 0
emulator_quota : 0

Comment 1 Alex Jia 2012-08-28 03:46:31 UTC
Patch on upstream and wait for review:

https://www.redhat.com/archives/libvir-list/2012-August/msg01763.html

Comment 2 Daniel Berrangé 2012-09-26 11:18:02 UTC
This inconsistency is a bug in the libvirt QEMU driver, not the Perl bindings.

Comment 3 Daniel Berrangé 2012-09-26 11:18:16 UTC
Posted a patch for libvirt

https://www.redhat.com/archives/libvir-list/2012-September/msg01764.html

Comment 8 weizhang 2012-10-16 11:31:18 UTC
verify pass on
libvirt-0.10.2-3.el6.x86_64
perl-Sys-Virt-0.10.2-2.el6.x86_64
qemu-kvm-0.12.1.2-2.322.el6.x86_64
kernel-2.6.32-329.el6.x86_64

cpu_shares can be set when domain is shutoff

Comment 9 errata-xmlrpc 2013-02-21 07:22:21 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-2013-0276.html