On Thu, 2007-12-13 at 09:40 -0500, Jeff Layton wrote:
> On Sat, 8 Dec 2007 14:07:47 +0000
> Christoph Hellwig <[email protected]> wrote:
>
> > > + mutex_lock(&nlmsvc_mutex);
> > > + while (atomic_read(&nlmsvc_ref) != 0) {
> >
> > might be better to do the refcounting outside the thread and use the
> > kthread api, which is something we still need to do for lockd anyway.
> >
>
> I took a swipe at doing this, and have a set of patches that make lockd
> use kthreads. It works well, but there's a problem once I add in the
> reference counting.
>
> In the situation that prompted this whole thing, the last nlmsvc_ref
> gets put by lockd itself. A kthread can't call kthread_stop on itself
> since it will deadlock.
>
> Is there a way to gracefully allow a kthread to shut itself down?
> Alternately, I suppose I could schedule_work() the kthread_stop, though
> that seems sort of ugly...
How about just 'return'? :-)
You shouldn't need to signal yourself to stop.
Cheers
Trond
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