[Bug 559088] Re: qemu-kvm and guest kernel 2.6.24 sporadic boot fail: Kernel panic - not syncing: IO-APIC + timer doesn't work!
If the diagnosis I posted above is correct, then the frequency with which this error appears will depend on both the virtualisation platform (in this case the KVM host) and the guest kernel. We virtualise CentOS 4.4 systems (2.6.9 kernel) and my colleague reports that, in two years of using VMware, he has not seen this error occur, and yet I can reliably repeat it with some frequency under KVM using Ubuntu Karmic. If you have seen the same problem using kernels =2.6.24, then maybe the above diagnosis is incorrect. It would be useful to verify the diagnosis by backporting the patch to the 2.6.9 kernel to find out whether it fixes the problem, but I don't really have time to do that. It is quite easy to set up a test system: install a guest OS with poweroff in /etc/rc.local, and then write a script that loops calling virsh start. Eventually the guest kernel will hang on boot, and you can connect to the console. -- qemu-kvm and guest kernel 2.6.24 sporadic boot fail: Kernel panic - not syncing: IO-APIC + timer doesn't work! https://bugs.launchpad.net/bugs/559088 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 559088] Re: qemu-kvm and guest kernel 2.6.24 sporadic boot fail: Kernel panic - not syncing: IO-APIC + timer doesn't work!
10.04 has a new kernel that contains ~11 kvm related patches. Can you confirm this issue on the latest kernel? 2.6.32-21-server? -- qemu-kvm and guest kernel 2.6.24 sporadic boot fail: Kernel panic - not syncing: IO-APIC + timer doesn't work! https://bugs.launchpad.net/bugs/559088 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 559088] Re: qemu-kvm and guest kernel 2.6.24 sporadic boot fail: Kernel panic - not syncing: IO-APIC + timer doesn't work!
** Changed in: qemu-kvm (Ubuntu) Importance: Undecided = Medium ** Changed in: qemu-kvm (Ubuntu) Importance: Medium = Low ** Changed in: qemu-kvm (Ubuntu) Status: New = Triaged -- qemu-kvm and guest kernel 2.6.24 sporadic boot fail: Kernel panic - not syncing: IO-APIC + timer doesn't work! https://bugs.launchpad.net/bugs/559088 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 559088] Re: qemu-kvm and guest kernel 2.6.24 sporadic boot fail: Kernel panic - not syncing: IO-APIC + timer doesn't work!
Thanks for the research Chris. Marking Triaged, since you've tracked this down to the upstream mailing list posts. Marking Low, since kernels 2.6.24 are (hopefully) becoming increasingly rare. To your two suggestions... I know that upstream qemu in the past has really, really tried to avoid special case code for buggy behavior in guests. The latter is far more doable. How do you propose that we do this? If your guest is an Ubuntu kernel 2.6.24 (ie, Dapper), we can open a task and try to get it fixed. If it's another distribution, I suggest you try to contact that distribution's kernel developers. -- qemu-kvm and guest kernel 2.6.24 sporadic boot fail: Kernel panic - not syncing: IO-APIC + timer doesn't work! https://bugs.launchpad.net/bugs/559088 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
