Bug 1110429
Summary: | need a non-event way to determine qemu's current offset from utc | |||
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Product: | Red Hat Enterprise Linux 7 | Reporter: | Ademar Reis <areis> | |
Component: | qemu-kvm-rhev | Assignee: | Marcelo Tosatti <mtosatti> | |
Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> | |
Severity: | low | Docs Contact: | ||
Priority: | unspecified | |||
Version: | 7.0 | CC: | ajia, areis, berrange, bsarathy, chayang, cpelland, cwei, danken, dyuan, eblake, juzhang, knoel, laine, lsu, michal.skrivanek, michen, mjgkeele, mkenneth, mrezanin, mtosatti, mzhan, pbonzini, peet, qzhang, rbalakri, scui, sluo, virt-maint | |
Target Milestone: | rc | |||
Target Release: | --- | |||
Hardware: | All | |||
OS: | All | |||
Whiteboard: | ||||
Fixed In Version: | qemu 2.1.0 | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | ||
Clone Of: | 1100419 | |||
: | 1139766 (view as bug list) | Environment: | ||
Last Closed: | 2015-03-05 09:47:27 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: | ||||
Bug Depends On: | 1100419 | |||
Bug Blocks: | 1110708, 1139766 |
Comment 2
Paolo Bonzini
2014-07-08 08:35:26 UTC
QEMU commit 654a36d857ff949e0d1989904b76f53fded9dc83 part of QEMU 2.1.0, marking as MODIFIED. (In reply to Marcelo Tosatti from comment #3) > QEMU commit 654a36d857ff949e0d1989904b76f53fded9dc83 part of QEMU 2.1.0, > marking as MODIFIED. Update this bz to qemu-kvm-rhev component since this bz is fixed qemu2.1. Free to correct me if there is wrong. Best Regards, Junyi Verify this issue with the instruction of comment #8 on qemu-kvm-rhev-2.1.2-1.el7.x86_64. host info: # uname -r && rpm -q qemu-kvm-rhev && rpm -q seabios 3.10.0-171.el7.x86_64 qemu-kvm-rhev-2.1.2-1.el7.x86_64 seabios-1.7.5-5.el7.x86_64 guest info: 3.10.0-171.el7.x86_64 Steps: 1) Start guest via qemu command line. e.g:/usr/libexec/qemu-kvm -M pc -S -cpu SandyBridge -enable-kvm -m 4096 -smp 4,sockets=2,cores=2,threads=1 -no-kvm-pit-reinjection...-rtc base=localtime,clock=host,driftfix=slew... 2) Execute the following QMP commands: { "execute": "qmp_capabilities" } {"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"} } 3) Save the output of "qom-get" command. {"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"} } {"return": {"tm_year": 114, "tm_sec": 46, "tm_hour": 2, "tm_min": 53, "tm_mon": 9, "tm_mday": 8}} 4) Read RTC date inside the guest. # hwclock Wed 08 Oct 2014 10:53:59 AM CST -10.010463 seconds 5) Adjust RTC date inside the guest with "hwclock" command (--set --data XXXX i believe) to current RTC value minus one hour. # hwclock --set --date "2014-10-08 11:53:59" 6) Execute the same "qom-get" command as in step 2. {"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"} } {"return": {"tm_year": 114, "tm_sec": 16, "tm_hour": 3, "tm_min": 54, "tm_mon": 9, "tm_mday": 8}} Results: The difference between the values of "qom-get" in step 3 and step 6 is differ by approximately 1 hour. {"return": {"tm_year": 114, "tm_sec": 46, "tm_hour": 2, "tm_min": 53, "tm_mon": 9, "tm_mday": 8}} ^^^^^ {"return": {"tm_year": 114, "tm_sec": 16, "tm_hour": 3, "tm_min": 54, "tm_mon": 9, "tm_mday": 8}} ^^^^^ Base on above, this issue has been fixed correctly, move to VERIFIED status, please correct me if any mistake, thanks. Best Regards, sluo (In reply to Sibiao Luo from comment #9) > Verify this issue with the instruction of comment #8 on > qemu-kvm-rhev-2.1.2-1.el7.x86_64. > host info: > # uname -r && rpm -q qemu-kvm-rhev && rpm -q seabios > 3.10.0-171.el7.x86_64 > qemu-kvm-rhev-2.1.2-1.el7.x86_64 > seabios-1.7.5-5.el7.x86_64 > guest info: > 3.10.0-171.el7.x86_64 > > Steps: > 1) Start guest via qemu command line. > e.g:/usr/libexec/qemu-kvm -M pc -S -cpu SandyBridge -enable-kvm -m 4096 -smp > 4,sockets=2,cores=2,threads=1 -no-kvm-pit-reinjection...-rtc > base=localtime,clock=host,driftfix=slew... > 2) Execute the following QMP commands: > { "execute": "qmp_capabilities" } > {"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"} } > > 3) Save the output of "qom-get" command. > {"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"} } > {"return": {"tm_year": 114, "tm_sec": 46, "tm_hour": 2, "tm_min": 53, > "tm_mon": 9, "tm_mday": 8}} > > 4) Read RTC date inside the guest. > # hwclock > Wed 08 Oct 2014 10:53:59 AM CST -10.010463 seconds > > 5) Adjust RTC date inside the guest with "hwclock" command (--set --data > XXXX i believe) to current RTC value minus one hour. > # hwclock --set --date "2014-10-08 11:53:59" > I can get the RTC_CHANGE event after this steps. {"timestamp": {"seconds": 1412736957, "microseconds": 817109}, "event": "RTC_CHANGE", "data": {"offset": -25308}} > 6) Execute the same "qom-get" command as in step 2. > {"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"} } > {"return": {"tm_year": 114, "tm_sec": 16, "tm_hour": 3, "tm_min": 54, > "tm_mon": 9, "tm_mday": 8}} > > Results: > The difference between the values of "qom-get" in step 3 and step 6 is > differ by approximately 1 hour. > {"return": {"tm_year": 114, "tm_sec": 46, "tm_hour": 2, "tm_min": 53, > "tm_mon": 9, "tm_mday": 8}} ^^^^^ > > {"return": {"tm_year": 114, "tm_sec": 16, "tm_hour": 3, "tm_min": 54, > "tm_mon": 9, "tm_mday": 8}} ^^^^^ > > Base on above, this issue has been fixed correctly, move to VERIFIED status, > please correct me if any mistake, thanks. > > Best Regards, > sluo 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/RHSA-2015-0624.html |