Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected)

Avi Kivity
2009-03-15T09:56:57Z

Ingo Molnar wrote:
>> I've looked at the traces but lack the skill to make any sense
>> out of them.
>>
>
> Do you have specific questions about them that we could answer?
>

A general question: what's going on? I guess this will only be answered
by me getting my hands dirty and understanding how ftrace works and how
the output maps to what's happening. I'll look at the docs for a while.

A specific question for now is how can I identify long latency within
qemu here? As far as I can tell all qemu latencies in trace6.txt are
sub 100ms, which, while long, don't explain the guest stalling for many
seconds.

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