Re: external module sched_in event

Avi Kivity
2007-12-22T20:24:26Z

Izik Eidus wrote:
>> This fixes my longstanding KVM instability and "-smp 2" now works
>> flawlessy with svm too! -smp 2 -snapshot crashes in qemu userland but
>> that's not kernel related, must be some thread mutex lock recursion or
>> lock inversion in the qcow cow code. Removing -snapshot make -smp 2
>> stable. Multiple guests UP and SMP seems stable too.
>>
>>
> you mean that without -snapshot, the userspace not hang at the sigwait()
> in the qcow code?
>

The problem is probably exaggerated by -snapshot, which needs much more
metadata activity than without -snapshot.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.