2017-11-06 17:29 GMT+08:00 Paolo Bonzini <[email protected]>:
> On 06/11/2017 01:55, Wanpeng Li wrote:
>> This can be reproduced when running kvm-unit-tests/hyperv_stimer.flat and
>> cpu-hotplug stress simultaneously. kvm_get_time_scale() takes too long which
>> results in softlockup.
>
> Apart from the pr_debug, kvm_get_time_scale should take less than a
> microsecond. The patch is fine, but can you confirm that pr_debug is
> the culprit?
I can still encounter softlockup after removing the pr_debug.
Regards,
Wanpeng Li
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