Re: Fw: [PATCH -mm] workqueue: debug possible endless loop in cancel_rearming_delayed_work

[Jarek Poplawski <jarkao2@o2.pl>]

On Wed, Apr 25, 2007 at 02:20:38PM +0200, Jarek Poplawski wrote:
> 2 cents more...
... 
> On Tue, Apr 24, 2007 at 10:55:37PM +0400, Oleg Nesterov wrote:
> > +	do {
> > +		retry = 1;

Of course this'll be shorter:

		retry = 0;

> > +		spin_lock_irq(&cwq->lock);
> > +		/* CPU_DEAD in progress may change cwq */
> > +		if (likely(cwq == get_wq_data(work))) {
> > +			list_del_init(&work->entry);
> > +			__set_bit(WORK_STRUCT_PENDING, work_data_bits(work));
> > +			retry = try_to_del_timer_sync(&dwork->timer) < 0;
> > +		}
> > +		spin_unlock_irq(&cwq->lock);
> > +	} while (unlikely(retry));
...

Jarek P.
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