Bug 821655
| Summary: | Guest sometimes hangs after migrating from RHEL6.1 host to RHEL6.3 host with -M rhel6.1.0 with spice+qxl | ||||||||||
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| Product: | Red Hat Enterprise Linux 6 | Reporter: | Qunfang Zhang <qzhang> | ||||||||
| Component: | qemu-kvm | Assignee: | David Blechter <dblechte> | ||||||||
| Status: | CLOSED WONTFIX | QA Contact: | Virtualization Bugs <virt-bugs> | ||||||||
| Severity: | medium | Docs Contact: | |||||||||
| Priority: | medium | ||||||||||
| Version: | 6.3 | CC: | areis, dblechte, juzhang, kem, knoel, michen, mkenneth, rbalakri, rpacheco, toracat, uril, virt-maint | ||||||||
| Target Milestone: | rc | ||||||||||
| Target Release: | --- | ||||||||||
| Hardware: | Unspecified | ||||||||||
| OS: | Unspecified | ||||||||||
| Whiteboard: | |||||||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||||||
| Doc Text: | Story Points: | --- | |||||||||
| Clone Of: | Environment: | ||||||||||
| Last Closed: | 2017-12-06 11:44:30 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: | |||||||||||
| Attachments: |
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Description
Qunfang Zhang
2012-05-15 09:22:19 UTC
Additional phenomenon: After migrate, the guest sometimes log out, and I need to re-login again. Can you provide more info about what the qemu thread is doing when it consumes 100% cpu? Also, please let us know the hardware info for the source and target host. What type of processors? Can you give us login access? Hi, your hosts time is not synced (around 30s diff) ,this can cause the hangs when migrating see https://bugzilla.redhat.com/show_bug.cgi?id=731100. Can you sync the hosts clock and see if it helps ? (In reply to comment #7) > Hi, > your hosts time is not synced (around 30s diff) ,this can cause the hangs > when migrating see https://bugzilla.redhat.com/show_bug.cgi?id=731100. > Can you sync the hosts clock and see if it helps ? Hi, Orit Actually the issue can be reproduced when sync the time of the two hosts. It happened when I reported the bug, and also happened on my re-test just now. :-) Sorry I'm not aware the two hosts time are different when I provided the environment. Could you help check it again? Thanks. Can you provide with the output of qemu monitor when this happens ? Can you provide me with spice logs too ? Also strace output of qemu when the guest hangs . Created attachment 596316 [details]
qemu monitor log
Created attachment 596317 [details]
spice log (Xorg.0.log in guest)
Created attachment 596319 [details]
strace -p `pidof qemu-kvm` when the guest hangs
Hi, please help check the logs.
And when the guest hangs, top inside guest shows Xorg process consume 100% guest cpu.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2629 root 20 0 277m 51m 7076 R 100.0 5.1 0:17.91 Xorg
3096 root 20 0 15028 1196 892 R 0.3 0.1 0:00.06 top
1 root 20 0 19348 1524 1212 S 0.0 0.1 0:00.66 init
xorg-x11-drv-qxl version of guest: xorg-x11-drv-qxl-0.0.14-13.el6_2.x86_64 This request was not resolved in time for the current release. Red Hat invites you to ask your support representative to propose this request, if still desired, for consideration in the next release of Red Hat Enterprise Linux. (In reply to comment #13) > Created attachment 596319 [details] > strace -p `pidof qemu-kvm` when the guest hangs > > Hi, please help check the logs. > > And when the guest hangs, top inside guest shows Xorg process consume 100% > guest cpu. > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > 2629 root 20 0 277m 51m 7076 R 100.0 5.1 0:17.91 Xorg > > 3096 root 20 0 15028 1196 892 R 0.3 0.1 0:00.06 top > > 1 root 20 0 19348 1524 1212 S 0.0 0.1 0:00.66 init I tried reproducing with your machines and failed (i.e. successfull migration) but only tried once. What is the frequency/percent of the time this happens? Can you provide output of perf top or just attach with gdb and break (hoping it will be relevant) to Xorg when the 100% happens? Can you ssh to the vm when this happens? Thanks, Alon This request was erroneously removed from consideration in Red Hat Enterprise Linux 6.4, which is currently under development. This request will be evaluated for inclusion in Red Hat Enterprise Linux 6.4. This request was not resolved in time for the current release. Red Hat invites you to ask your support representative to propose this request, if still desired, for consideration in the next release of Red Hat Enterprise Linux. This question from Alon is the first thing we need an answer to.
> Can you provide output of perf top or just attach with gdb and break (hoping it will be relevant) to Xorg when the 100% happens? Can you ssh to the vm when this happens?
Adding needinfo(areis).
Red Hat Enterprise Linux 6 is in the Production 3 Phase. During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available. The official life cycle policy can be reviewed here: http://redhat.com/rhel/lifecycle This issue does not meet the inclusion criteria for the Production 3 Phase and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification. Note that a strong business justification will be required for re-evaluation. Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL: https://access.redhat.com/ |