Re: calling kthread_create() from interrupt thread

[Dean Nelson <dcn@sgi.com>]

On Tue, Jun 15, 2004 at 07:49:37PM +0200, Arjan van de Ven wrote:
> On Tue, 2004-06-15 at 19:42, Dean Nelson wrote:
> > I'm working on a driver that needs to create threads that can sleep/block
> > for an indefinite period of time.
> > 
> >     . Can kthread_create() be called from an interrupt handler?
> 
> no
> 
> > 
> >     . Is the cost of a kthread's creation/demise low enough so that one
> >       can, as often as needed, create a kthread that performs a simple
> >       function and exits?  Or is the cost too high for this?
> 
> for that we have keventd in 2.4, work queues in 2.6

As mentioned above, it is possible for this "simple" function to sleep/block
for an indefinite period of time. I was under the impression that one
couldn't block a work queue thread for an indefinite period of time. Am
I mistaken?

Thanks,
Dean