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

[Michael Ellerman]

Tejun Heo <tj at kernel.org> writes:

> 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.

Huh?

You changed the workqueue code to avoid that in 2186d9f940b6
("workqueue: move wq_numa_init() to workqueue_init()"), didn't you?

cheers