Re: [patch, -rc5-mm3] fix irqpoll some more

Ingo Molnar
2006-06-06T13:54:47Z

* Steven Rostedt <rostedt@goodmis.org> wrote:

> On Mon, 2006-06-05 at 10:49 +0200, Ingo Molnar wrote:
>
> > + /*
> > + * HACK:
> > + *
> > + * In the first pass we dont touch handlers that are behind
> > + * a disabled IRQ line. In the second pass (having no other
> > + * choice) we ignore the disabled state of IRQ lines. We've
> > + * got a screaming interrupt, so we have the choice between
> > + * a real lockup happening due to that screaming interrupt,
> > + * against a theoretical locking that becomes possible if we
> > + * ignore a disabled IRQ line.
>
> FYI, with irqpoll on in my i386 SMP machine, I hit this theoretical
> locking every time in the vortex driver.

you got a lockup/deadlock every time, due to the bug that the lock
validator pointed out?

Ingo