Bug 604188
| Summary: | Guest suffers kernel panic when save snapshot then restart guest | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | RHEL Program Management <pm-rhel> |
| Component: | kvm | Assignee: | Virtualization Maintenance <virt-maint> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 5.5 | CC: | apevec, cpelland, kwolf, llim, mgoldboi, mkenneth, ovirt-maint, pm-eus, qzhang, tburke, virt-maint, ykaul |
| Target Milestone: | rc | Keywords: | Reopened, ZStream |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kvm-83-164.el5_5.12 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2010-06-22 14:40:16 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: | 542954 | ||
| Bug Blocks: | 556823 | ||
|
Description
RHEL Program Management
2010-06-15 15:03:24 UTC
Comment from Kevin, QE please take note and make sure the suggestions made by Kevin are well covered. ======================= Anything that uses lots of synchronous reads/writes (i.e. metadata operations). Long snapshots chains where a lot of COW happens seems to be a good candidate. It's probably enough to test intensively with one backing file format, preferably qcow2 which may issue synchronous metadata I/O again and therefore makes the scenario more complex. For verification of the fix, you need to use virtio-blk (multiple requests running at once are required to even trigger this bug). On the other hand, only IDE can directly call synchronous bdrv_read/write which is touched by this patch, so in order to avoid regressions some tests on IDE should be run, too. Kevin Tested with the steps in bug #542954, and that issue does not happen on kvm-83-164.el5_5.12. Besides, we will do more test for this bug, and will upload the test result after finished. Test runners for verifying this bug: https://tcms.engineering.redhat.com/run/10370/ (NFS) https://tcms.engineering.redhat.com/run/10369/ (block device) Result: Passed. kvm version: kvm-83-164.el5_5.12 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/RHBA-2010-0479.html |