Re: [PATCH 2/2] sched: do not call workqueue sleep hook if task is already dead

[Peter Zijlstra]

On Wed, Sep 21, 2016 at 05:43:50PM +0200, Roman Pen wrote:
> If panic_on_oops is not set and oops happens inside workqueue kthread,
> kernel kills this kthread.  Current patch fixes recursive GPF which
> happens in that case with the following stack:


> The root cause is that zeroed task->vfork_done member is accessed from
> wq_worker_sleeping() hook. 

This is the kthread_data() -> to_kthread() thing? Could've done with
spelling out, now you had me searching all over :/


Urgh what a mess..