Bug 1218577
| Summary: | iothreaddel can make a vm have broken settings which will make vm lose track after restart libvirtd | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Luyao Huang <lhuang> |
| Component: | libvirt | Assignee: | John Ferlan <jferlan> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.2 | CC: | dyuan, honzhang, mzhan, rbalakri, shyu |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | libvirt-1.2.16-1.el7 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-11-19 06:30:06 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: | |||
Posted patches upstream: http://www.redhat.com/archives/libvir-list/2015-May/msg00156.html Pushed a fix upstream to resolve this:
commit 361801362fb047ceb63e303efec224aea73a179a
Author: John Ferlan <jferlan>
Date: Wed May 6 10:19:30 2015 -0400
qemu: Clear autofil fill flag when pinning iothread
git describe 361801362fb047ceb63e303efec224aea73a179a
v1.2.15-79-g3618013
Verify this bug with libvirt-1.2.17-2.el7.x86_64:
1.
# virsh dumpxml rhel7.0-rhel |grep iothread
<iothreads>2</iothreads>
<iothreadids>
<iothread id='1'/>
</iothreadids>
2.
# virsh start rhel7.0-rhel
Domain rhel7.0-rhel started
3.
# virsh iothreadinfo rhel7.0-rhel
IOThread ID CPU Affinity
---------------------------------------------------
1 0-3
2 0-3
4.
# virsh iothreaddel rhel7.0-rhel 1
5.
# virsh iothreadinfo rhel7.0-rhel
IOThread ID CPU Affinity
---------------------------------------------------
2 0-3
6.
# virsh dumpxml rhel7.0-rhel |grep iothread
<iothreads>1</iothreads>
<iothreadids>
<iothread id='2'/>
</iothreadids>
7.
# virsh iothreadpin rhel7.0-rhel 2 1
8.
# virsh dumpxml rhel7.0-rhel |grep iothread
<iothreads>1</iothreads>
<iothreadids>
<iothread id='2'/>
</iothreadids>
<iothreadpin iothread='2' cpuset='1'/>
9.
# virsh list
Id Name State
----------------------------------------------------
16 rhel7.0-rhel running
10.
# virsh dumpxml rhel7.0-rhel |grep iothread
<iothreads>1</iothreads>
<iothreadids>
<iothread id='2'/>
</iothreadids>
<iothreadpin iothread='2' cpuset='1'/>
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. https://rhn.redhat.com/errata/RHBA-2015-2202.html |
description of problem: iothreaddel can make a vm have broken settings which will make vm lose track after restart libvirtd Version-Release number of selected component (if applicable): libvirt-1.2.15-1.el7.x86_64 qemu-kvm-rhev-2.3.0-1.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1. prepare a offline vm: # virsh dumpxml test3 <iothreads>2</iothreads> <iothreadids> <iothread id='1'/> </iothreadids> 2. start it # virsh start test3 Domain test3 started 3. # virsh iothreadinfo test3 IOThread ID CPU Affinity --------------------------------------------------- 1 0-3 2 0-3 4. use iothreaddel remove thread 1 # virsh iothreaddel test3 1 5. bind thread 2 to cpu 1 # virsh iothreadpin test3 2 1 # virsh dumpxml test3 <iothreads>1</iothreads> <cputune> <iothreadpin iothread='2' cpuset='1'/> </cputune> 6. check the cgroup # cgget -g cpuset /machine.slice/machine-qemu\\x2dtest3.scope/iothread2 /machine.slice/machine-qemu\x2dtest3.scope/iothread2: cpuset.memory_spread_slab: 0 cpuset.memory_spread_page: 0 cpuset.memory_pressure: 0 cpuset.memory_migrate: 1 cpuset.sched_relax_domain_level: -1 cpuset.sched_load_balance: 1 cpuset.mem_hardwall: 0 cpuset.mem_exclusive: 0 cpuset.cpu_exclusive: 0 cpuset.mems: 0 cpuset.cpus: 1 7. restart libvirtd vm will lose track: # virsh list Id Name State ---------------------------------------------------- 8. check the log 2015-05-05 06:29:48.382+0000: 17710: error : virDomainIOThreadPinDefParseXML:13374 : unsupported configuration: Cannot find 'iothread' : 2 Actual results: iothreaddel can make a vm have broken settings which will make vm lose track after restart libvirtd Expected results: guest still exist after restart libvirtd infomation: