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? Thanks, Paolo
