Ubuntu
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  1. Bug #905246
  2. Comment #5

Comment 5 for bug 905246

Revision history for this message
Matthew O'Connor (uvirjf2u1144-matt-hknftjnl78lw) wrote : Re: kernel BUG at /build/buildd/linux-3.0.0/arch/x86/kvm/mmu.c:703

I have started encountering this problem since upgrade from 11.04 to 11.10, also. Current kernel version is:

3.0.0-19-server #33-Ubuntu SMP Thu Apr 19 20:32:48 UTC 2012 x86_64 x86_64 x86_64

I run KVM/QEMU on the afflicted system and attach to an iSCSI target. Nothing visible in the logs. I have kernel.panic configured in my sysctl, also, but it has no effect and the system does not restart. I actually have a pair of systems on identical kernel versions. The surviving system isn't doing much work right now, whereas the failing system is running a couple of KVM/QEMU virtual machines. It takes about 12-18 hours for this failure to occur right now. Unfortunately by the time I get to the machine's terminal, so many "rcu_sched_state..." messages have printed that I don't see if there is a BUG report or stack-trace available.

I would like to assist with testing - which upstream kernel should I try, and should I only look at the oneiric releases or can I push into the precise releases? Anything else I can do to help?