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Bug 864381 - Failed to set vcpu scheduler parameters after hotplug vcpu
Summary: Failed to set vcpu scheduler parameters after hotplug vcpu
Keywords:
Status: CLOSED DUPLICATE of bug 857013
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libvirt
Version: 6.4
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Osier Yang
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-10-09 09:55 UTC by hongming
Modified: 2012-10-09 14:03 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-10-09 14:03:38 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description hongming 2012-10-09 09:55:28 UTC 
Description of problem:
Failed to set vcpu scheduler parameters after hotplug vcpu.  The following errors occur.
error: Unable to find vcpu cgroup for rhel6.2(vcpu: 1): No such file or directory


Version-Release number of selected component (if applicable):
libvirt-0.10.2-1.el6.x86_64
qemu-kvm-0.12.1.2-2.310.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1.# virsh start rhel6.2
Domain rhel6.2 started

2.# virsh vcpucount rhel6.2
maximum      config        10
maximum      live          10
current      config         1
current      live           1

3.# virsh setvcpus rhel6.2 2

4.# virsh schedinfo rhel6.2
Scheduler      : posix
cpu_shares     : 2048
vcpu_period    : 1000000
vcpu_quota     : 18446744073709551
emulator_period: 1000000
emulator_quota : 18446744073709551

5.# virsh schedinfo rhel6.2 --set vcpu_quota=1000
Scheduler      : posix
error: Unable to find vcpu cgroup for rhel6.2(vcpu: 1): No such file or
directory

6.# ll /cgroup/cpu/libvirt/qemu/rhel6.2/vcpu1
ls: cannot access /cgroup/cpu/libvirt/qemu/rhel6.2/vcpu1: No such file
or directory


7.# vim /var/log/libvirtd.log
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupNew:617 : New group
/libvirt/qemu/rhel6.2/vcpu1
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupDetect:273 :
Detected mount/mapping 0:cpu at /cgroup/cpu in
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupDetect:273 :
Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupDetect:273 :
Detected mount/mapping 2:cpuset at /cgroup/cpuset in
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupDetect:273 :
Detected mount/mapping 3:memory at /cgroup/memory in
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupDetect:273 :
Detected mount/mapping 4:devices at /cgroup/devices in
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupDetect:273 :
Detected mount/mapping 5:freezer at /cgroup/freezer in
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupDetect:273 :
Detected mount/mapping 6:blkio at /cgroup/blkio in
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupMakeGroup:535 :
Make group /libvirt/qemu/rhel6.2/vcpu1
2012-09-20 03:22:18.687+0000: 1511: debug : virCgroupMakeGroup:560 :
Make controller /cgroup/cpu/libvirt/qemu/rhel6.2/vcpu1/
2012-09-20 03:22:18.687+0000: 1511: error : qemuSetVcpusBWLive:7745 :
Unable to find vcpu cgroup for rhel6.2(vcpu: 1): No such file or directory
2012-09-20 03:22:18.687+0000: 1511: debug : virDomainFree:2281 :
dom=0x7f852800dd70, (VM: name=rhel6.2,
uuid=17210b7f-6bcf-c46d-404e-9652796a93b9)
2012-09-20 03:22:18.687+0000: 1511: debug : virObjectUnref:135 :
OBJECT_UNREF: obj=0x7f852800dd70
2012-09-20 03:22:18.687+0000: 1511: debug : virObjectUnref:137 :
OBJECT_DISPOSE: obj=0x7f852800dd70
2012-09-20 03:22:18.687+0000: 1511: debug : virDomainDispose:225 :
release domain 0x7f852800dd70 rhel6.2 17210b7f-6bcf-c46d-404e-9652796a93b9
2012-09-20 03:22:18.687+0000: 1511: debug : virObjectUnref:135 :
OBJECT_UNREF: obj=0x7f851805b2f0


Actual result
Failed to set vcpu scheduler parameters after hotplug vcpu.

Expect result
Successfully set vcpu scheduler parameters after hotplug vcpu.

Additional info
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