Re: Real-Time Preemption, -RT-2.6.12-final-V0.7.50-24

Daniel Walker
2005-07-12T14:35:07Z

On Tue, 2005-07-12 at 16:28 +0200, Ingo Molnar wrote:
> * Daniel Walker <dwalker@mvista.com> wrote:
>
> > I observed a situation on a dual xeon where IOAPIC_POSTFLUSH , if on,
> > would actually cause spurious interrupts. It was odd cause it's
> > suppose to stop them .. If there was a lot of interrupt traffic on one
> > IRQ , it would cause interrupt traffic on another IRQ. This would
> > result in "nobody cared" messages , and the storming IRQ line would
> > get shutdown.
> >
> > This would only happen in PREEMPT_RT .
>
> does it happen with the latest kernel too? There were a couple of things
> broken in the IOAPIC code in various earlier versions.

I haven't tested it recently . This was on an older version of RT
though . I could try it if it's interesting ? Or do you think it's
already fixed?

Daniel