On 04/11, Gautham R Shenoy wrote:
>
> On Wed, Apr 11, 2007 at 12:13:34PM +0200, Rafael J. Wysocki wrote:
> >
> > It should be calling try_to_freeze() somewhere anyway. We may need to freeze
> > all tasks in some cases.
>
> How about
> for (;;) {
> try_to_freeze();
>
> ?
Why?
> This change allows us to make all the worker threads freezeable by default.
> >From cpu-hotplug perspective, helper_wq was the only singlethreaded
> non-freezeable workqueue.
I think Eric's patch is what you need. We should _not_ freeze kthreadd(), we
need kthread_create() after freezing. Now it doesn't depend on workqueues, we
can freeze them all, single-thread or not.
I like this patch.
Oleg.
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