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

Ingo Molnar
2005-07-12T14:30:56Z

* 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.

Ingo