Re: [PATCH 00/11] nested sleeps, fixes and debug infrastructure

Peter Zijlstra
2014-10-29T11:31:13Z

On Wed, Oct 29, 2014 at 10:35:03AM +0100, Peter Zijlstra wrote:
> On Wed, Oct 29, 2014 at 01:00:56AM +0100, Oleg Nesterov wrote:

> > But what if it calls try_to_freeze() and another thread (which should
> > be frozen too) sleeps in kthread_stop() ?
>
> Fair point indeed. Now I had a look at __refrigerator() and is there any
> reason we should not remove that .check_kthr_stop argument and replace
> it with an unconditional (current->flags & PF_KTHREAD) ?

Hmm, doesn't kthread_freezable_should_stop() suffer the same problem? It
should not refrigerate when should_stop.