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+++ This bug was initially created as a clone of Bug #1035108 +++ Description of problem: Implement the error message while plug more CPUs than set in "current" using the guest agent Version-Release number of selected component (if applicable): qemu-kvm-rhev-1.5.3-19.el7.x86_64 libvirt-1.1.1-13.el7.x86_64 kernel-3.10.0-47.el7.x86_6 qemu-guest-agent-1.5.3-19.el7.x86_64.rpm How reproducible: 100% Steps 1.Prepare a running guest with qemu-ga service installed # virsh list Id Name State ---------------------------------------------------- 32 rhel7 running # virsh dumpxml rhel7 |grep cpu -A 3 <vcpu placement='static' current='1'>3</vcpu> 2. Start the qemu-guest-agent service in the guest #systemctl start qemu-guest-agent 3. Do cpu hotpulug and plug more CPUs than set in "current" using the guest agent, it report an unclear error # virsh setvcpus rhel7 --guest 2 error: internal error: guest agent reports less cpu than requested # virsh vcpucount rhel7 --guest 1 4.Both rhel6 and rhel7 have the same result with step3 Actual results: Didn't report an clear error while plug more CPUs than set in "current" using the guest agent Expected results: Should report an clear error message
Could reporduce it on RHEL6.5 with following packages: qemu-kvm-rhev-0.12.1.2-2.415.el6_5.3.x86_64 libvirt-client-0.10.2-29.el6_5.2.x86_64 libvirt-0.10.2-29.el6_5.2.x86_64 qemu-guest-agent-0.12.1.2-2.415.el6.x86_64 The step is same with bug description, and the result shows below: [root@red01 images]# virsh dumpxml rhel6u5_qcow2 | grep vcpu <vcpu placement='static' current='1'>3</vcpu> [root@red01 images]# virsh setvcpus rhel6u5_qcow2 --guest 2 error: internal error guest agent reports less cpu than requested [root@red01 images]# virsh setvcpus rhel6u5_qcow2 --guest error: command 'setvcpus' requires --count option [root@red01 images]# virsh vcpucount rhel6u5_qcow2 --guest 1
Fixed upstream: commit 34b8449027adc44bd38151f384f5a5cdd64d996f Author: Peter Krempa <pkrempa> Date: Thu Dec 5 17:47:14 2013 +0100 qemu: Improve error when setting invalid count of vcpus via agent https://bugzilla.redhat.com/show_bug.cgi?id=1035108 When attempting to enable more vCPUs in the guest than is currently enabled in the guest but less than the maximum count for the VM we currently reported an unhelpful message: error: internal error: guest agent reports less cpu than requested This patch changes it to: error: invalid argument: requested vcpu count is greater than the count of enabled vcpus in the domain: 3 > 2
This bug is fixed in latest libvirt-0.10.2-32.el6, the verification steps are below: # virsh dumpxml r6 | grep cpu -A 3 <vcpu placement='auto' current='3'>5</vcpu> <numatune> <memory mode='strict' placement='auto'/> </numatune> # virsh setvcpus r6 4 --guest error: invalid argument: requested vcpu count is greater than the count of enabled vcpus in the domain: 4 > 3 # virsh vcpucount r6 --guest 3 # virsh setvcpus r6 2 --guest # virsh vcpucount r6 --guest 2 # virsh setvcpus r6 -1 --guest error: Invalid number of virtual CPUs # virsh setvcpus r6 99999 --guest error: numerical overflow: input too large: 99999 # virsh setvcpus r6 9999 --guest error: invalid argument: requested vcpus is greater than max allowable vcpus for the domain: 9999 > 5 And I change the status to VERIFIED.
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/RHBA-2014-1374.html