Bug 645308
| Summary: | guest time drift 29 second after migration and the guest's time offset become larger and larger | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Binbin Yu <byu> |
| Component: | kvm | Assignee: | Glauber Costa <gcosta> |
| Status: | CLOSED DUPLICATE | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5.6 | CC: | mkenneth, mshao, rwu, virt-maint, ykaul |
| Target Milestone: | rc | Keywords: | Triaged |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-01-18 09:56:30 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: | |||
| Bug Blocks: | 580948 | ||
This sound like a duplicate of a regression we recently came across. I am closing it as as such, but please reopen if you still see this problem with the most recent bits from the hypervisor. (kvm >= 83-219) *** This bug has been marked as a duplicate of bug 655990 *** |
Description of problem: After migrating the guest from src-host to dest-host by RHEVM, check the guest's time drift and it is beyond 4s.In addition, the guest's time offset become larger and larger. Version-Release number of selected component (if applicable): rhev-manager:sm81 guest:kernel-2.6.18-227.el5, x86_64/i386 host:rhev-hypervisor-5.5-2.2-7.3 kvm-83-164.el5_5.23 kernel-2.6.18-194.17.1.el5 How reproducible: always Steps to Reproduce: 1. in guest, do sync the ntp server and check the guest's time offset [guest]# ntpdate 10.5.26.10 19 Oct 23:48:27 ntpdate[2610]: adjust time server 10.5.26.10 offset -0.000612 sec [guest]ntpdate -q 10.5.26.10 server 10.5.26.10, stratum 1, offset 0.000974, delay 0.29233 19 Oct 23:48:30 ntpdate[2611]: adjust time server 10.5.26.10 offset 0.000974 sec 2. migrate the guest 3. after migration, check the guest's time offset [guest]# ntpdate -q 10.5.26.10 server 10.5.26.10, stratum 1, offset -29.401222, delay 0.38602 19 Oct 23:51:15 ntpdate[2643]: step time server 10.5.26.10 offset -29.401222 sec [guest]# ntpdate -q 10.5.26.10 server 10.5.26.10, stratum 1, offset -31.540362, delay 0.38489 19 Oct 23:51:24 ntpdate[2644]: step time server 10.5.26.10 offset -31.540362 sec [guest]# ntpdate -q 10.5.26.10 server 10.5.26.10, stratum 1, offset -33.602010, delay 0.38573 19 Oct 23:51:32 ntpdate[2645]: step time server 10.5.26.10 offset -33.602010 sec [guest]# ntpdate -q 10.5.26.10 server 10.5.26.10, stratum 1, offset -34.806259, delay 0.38715 19 Oct 23:51:37 ntpdate[2646]: step time server 10.5.26.10 offset -34.806259 sec [guest]# ntpdate -q 10.5.26.10 server 10.5.26.10, stratum 1, offset -36.337222, delay 0.38397 19 Oct 23:51:43 ntpdate[2647]: step time server 10.5.26.10 offset -36.337222 sec Actual results: the migrated guest occurs time drift,which is beyond 4s. Expected results: the migrated guest's time drift is about 0. Additional info: The qemu command line used in rhev-hypervisor-5.5-2.2-7.3 on source-host: /usr/libexec/qemu-kvm -no-hpet -usbdevice tablet -rtc-td-hack -startdate 2010-10-20T10:38:48 -name 5-5-386-vqe3 -smp 1,cores=1 -k en-us -m 1024 -boot c -net nic,vlan=1,macaddr=00:1a:4a:42:41:0f,model=e1000 -net tap,vlan=1,ifname=e1000_11_1,script=no -drive file=/rhev/data-center/ca69b608-e64a-49f6-baa9-19eadaf339d8/08e9a1bd-e22a-45da-b9a2-4f2037e81b9b/images/337d514a-2958-4307-928e-232641f70009/dede1ad4-4ea7-4e0c-8463-4c6c3828a341,media=disk,if=virtio,cache=off,serial=07-928e-232641f70009,boot=on,format=qcow2,werror=stop -pidfile /var/vdsm/f0ac8b08-1b90-46eb-8cda-85ec5d95df56.pid -vnc 0:11,password -incoming tcp::49153 -cpu qemu64,+sse2,+cx16,+ssse3 -M rhel5.5.0 -notify all -balloon none -smbios type=1,manufacturer=Red Hat,product=RHEV Hypervisor,version=5.5-2.2-7.3,serial=44454C4C-4200-104A-8048-B4C04F4D3258_00:22:19:c6:f6:12,uuid=f0ac8b08-1b90-46eb-8cda-85ec5d95df56 -vmchannel di:0200,unix:/var/vdsm/f0ac8b08-1b90-46eb-8cda-85ec5d95df56.guest.socket,server -monitor unix:/va! r/vdsm/f0ac8b08-1b90-46eb-8cda-85ec5d95df56.monitor.socket,server on dest-host: /usr/libexec/qemu-kvm -no-hpet -usbdevice tablet -rtc-td-hack -startdate 2010-10-20T03:49:07 -name 5-5-386-vqe3 -smp 1,cores=1 -k en-us -m 1024 -boot c -net nic,vlan=1,macaddr=00:1a:4a:42:41:0f,model=e1000 -net tap,vlan=1,ifname=e1000_10_1,script=no -drive file=/rhev/data-center/ca69b608-e64a-49f6-baa9-19eadaf339d8/08e9a1bd-e22a-45da-b9a2-4f2037e81b9b/images/337d514a-2958-4307-928e-232641f70009/dede1ad4-4ea7-4e0c-8463-4c6c3828a341,media=disk,if=virtio,cache=off,serial=07-928e-232641f70009,boot=on,format=qcow2,werror=stop -pidfile /var/vdsm/f0ac8b08-1b90-46eb-8cda-85ec5d95df56.pid -vnc 0:10,password -incoming tcp::49210 -cpu qemu64,+sse2,+cx16,+ssse3 -M rhel5.5.0 -notify all -balloon none -smbios type=1,manufacturer=Red Hat,product=RHEV Hypervisor,version=5.5-2.2-7.3,serial=44454C4C-4D00-1036-8048-B4C04F4D3258_00:22:19:b4:2c:a9,uuid=f0ac8b08-1b90-46eb-8cda-85ec5d95df56 -vmchannel di:0200,unix:/var/vdsm/f0ac8b08-1b90-46eb-8cda-85ec5d95df56.guest.socket,server -monitor unix:/va! r/vdsm/f0ac8b08-1b90-46eb-8cda-85ec5d95df56.monitor.socket,server