Re: Real-Time Preemption, -RT-2.6.12-final-V0.7.51-08

Ingo Molnar
2005-07-07T19:56:24Z

* William Weston <weston@sysex.net> wrote:

> On Thu, 7 Jul 2005, Ingo Molnar wrote:
>
> > > Without the last two chunks of this patch, the UP Athlon box locks up
> > > hard as soon as jackd is started up.
> >
> > hm, do you have CONFIG_PCI_MSI enabled by any chance?
>
> I've never enabled CONFIG_PCI_MSI. What's your experience when it
> comes to stability and performance?

it's really not needed unless you have PCI-X hardware, but it sometimes
gets enabled and it had IRQ handling bugs under PREEMPT_HARDIRQS (and
PREEMPT_RT), which i fixed in the -51-12 patch. But if you didnt have it
enabled then there's no IO-APIC change affecting your config.

Ingo