Hotplug all CPUs leaving CPU0 with cpufreq enabled

Bug #1340097 reported by viresh kumar on 2014-07-10
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Linaro PMWG QA
New
Undecided
sanjay singh rawat

Bug Description

Hi,

Recently a bug was found in cpufreq core:

http://<email address hidden>/msg86716.html

which makes me believe some basic testing is missing in our pm-qa setup. Otherwise this would have been reported for TC2 way back.

How to reproduce: Hotunplug all CPUs except CPU0 first. Then add them back in the same order.
i.e. offline 1,2,3,4,5,... and then online 1,2,3,4,5... (NOTE: We don't want that in reverse order).

This should create some kernel OOPs. Are we catching OOPs at all in our setup? Sorry for my lack
of knowledge.

--
viresh

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