Bug 643970
| Summary: | guest migration turns failed by the end (16G + stress load) | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Chris Pelland <cpelland> |
| Component: | qemu-kvm | Assignee: | Juan Quintela <quintela> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6.1 | CC: | amit.shah, bcao, cpelland, cww, gcosta, iheim, khong, lihuang, lilu, llim, michen, mkenneth, mshao, ndai, plyons, qwan, Rhev-m-bugs, syeghiay, tburke, virt-maint, yeylon, ykaul |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | 6.1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-0.12.1.2-2.138.el6 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | 601045 | Environment: | |
| Last Closed: | 2011-05-19 11:30:12 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 513765, 599330, 601045, 645188 | ||
| Bug Blocks: | 568128, 580951, 675199 | ||
|
Description
Chris Pelland
2010-10-18 17:03:42 UTC
*** Bug 645188 has been marked as a duplicate of this bug. *** *** Bug 632557 has been marked as a duplicate of this bug. *** Tested on qemu-kvm-0.12.1.2-2.146.el6 & kernel 2.6.32-113.el6.x86_64 How reproducible: 100% steps: 1.start a VM with 16GB mem on src host. eg:/usr/libexec/qemu-kvm -enable-kvm -m 16G -smp 4 -name rhel5U6 -uuid ddcbfb49-3411-1701-3c36-6bdbc00bedb9 -rtc base=utc,clock=host,driftfix=slew -boot c -drive file=/mnt/rhel6.raw,if=none,id=drive-ide0-0-0,boot=on,format=raw,cache=none -device virtio-blk-pci,drive=drive-ide0-0-0,id=drive-ide0-0-0 -netdev tap,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:50:a4:c2:c1 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -device usb-tablet,id=input0 -vnc :2 -device virtio-balloon-pci,id=ballooning -monitor stdio 2.running sress in the guest eg :#stress --cpu --vm 16 --vm-byte 256M --verbose 3.start listenning port. 4.do live migration .after 1 hour ,stop stress and wait for migration complete. 5.check guest's status Actual Results: migration successfully. network of guest was DOWN after migration. Additional info : Tried on the same image with 4G mem ,can not reproduce Based on above ,re-assign this bug . This is a different bug, it is related to this two bugzillas (they are for rhel5, but rhel6 has the same problem): https://bugzilla.redhat.com/show_bug.cgi?id=586643 https://bugzilla.redhat.com/show_bug.cgi?id=647189 basically you can't expect to have a 16GB host running a 16GB guest, problems are going to happen sooner or later. Migration has special problems because it needs extra memory for buffers to do the saves. My experience is that you need to leave around 1GB of memory for the host for everything to work smoothely. Several other things: a- I can't reproduce, it works for me. b- nitpik: I guess you mean --cpu 1 (or other number) that command fails for me. Later, Juan. (In reply to comment #11) > This is a different bug, it is related to this two bugzillas (they are for > rhel5, but rhel6 has the same problem): > https://bugzilla.redhat.com/show_bug.cgi?id=586643 > https://bugzilla.redhat.com/show_bug.cgi?id=647189 > basically you can't expect to have a 16GB host running a 16GB guest, problems > are going to happen sooner or later. Migration has special problems because it > needs extra memory for buffers to do the saves. My experience is that you need > to leave around 1GB of memory for the host for everything to work smoothely. I am using 2 hosts and both host's memory is 512G, I will reserve the machine again tormorrow for further testing . Re-tried ,guest no network down. did the steps in comment #10 with a wrong network config. Based on above ,this issue has been fixed An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2011-0534.html An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2011-0534.html |