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DescriptionNandini Chandra
2010-07-20 20:13:55 UTC
Description of problem:
virsh setvcpus can't change the number of virtual CPU active in a kvm
guest OS. We ran virsh setvcpus so as to change the number of virtual CPU
in a kvm guest OS after we stopped the guest OS. Then, the command reported
the following error message.
# virsh setvcpus rhel60_31 2
error: Requested operation is not valid: domain is not running
Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux Version Number: Red Hat Enterprise Linux 6.0
Release Number: Beta 1 snapshot 6
Architecture: x86_64
Kernel Version: kernel-2.6.32-30.el6.x86_64
Related Package Version: libvirt-client-0.8.1-7.el6.x86_64
How reproducible:
Always
Steps to Reproduce:
1. Run the following command so as to stop a kvm guest OS by the following command.
# virsh shutdown <domain-id>
2.2. Run the following command so as to check if the kvm guest OS has
been shut down.
# virsh dominfo rhel60_31
Id: -
Name: rhel60_31
UUID: e15cfcf8-2475-de81-6079-d5ec451d0965
OS Type: hvm
State: shut off
CPU(s): 1
Max memory: 1048576 kB
Used memory: 1048576 kB
Autostart: disable
3.Run the following command so as to change the number of virtual
CPU in the kvm guest OS.
# virsh setvcpus <domain-id> <count>
Actual results:
virsh setvcpus can't statically change the number of virtual CPU
active in a kvm guest OS.
Expected results:
virsh setvcpus can statically change the number of virtual CPU active
in a kvm guest OS.
Additional info:
We can change the number of virtual CPU by the virt-manager.So the virsh
setvcpus should behave as well as virt-manager. We believe that this
is due to a virsh setvcpus's bug.
Comment 1RHEL Program Management
2010-07-20 20:17:48 UTC
This issue has been proposed when we are only considering blocker
issues in the current Red Hat Enterprise Linux release.
** If you would still like this issue considered for the current
release, ask your support representative to file as a blocker on
your behalf. Otherwise ask that it be considered for the next
Red Hat Enterprise Linux release. **
This is NOTABUG. It's intentional that setvcpus only changes vcpus on a running domain. If you want to change them on a shutdown domain, you can use "virsh edit" and edit the <vcpus> XML element.
Chris Lalancette
(In reply to comment #2)
> This is NOTABUG. It's intentional that setvcpus only changes vcpus on a
> running domain. If you want to change them on a shutdown domain, you can use
> "virsh edit" and edit the <vcpus> XML element.
>
> Chris Lalancette
Actually, the rebase in RHEL 6.1 to newer libvirt picked up the addition of 'virsh setvcpus --config' which does allow changing of vcpus on a shutdown domain. Therefore, this can be marked as a duplicate of the rebase bug.
*** This bug has been marked as a duplicate of bug 653985 ***