kworker with empty task->cpus_allowed (was Re: [v4.12-rc1 regression] mount ext4 fs results in kernel crash on PPC64le host)

[Tejun Heo]

Hello,

Could be the same problem as the one reported in the following thread.

 http://lkml.kernel.org/r/1497266622.15415.39.camel@abdul.in.ibm.com

The root cause there is ppc arch code not setting up possible cpu <->
numa mapping during boot.

Thanks.

-- 
tejun