Re: PCI, ACPI, IRQ, IOAPIC: reroute PCI interrupt to legacy boot interrupt equivalent

Steven Rostedt
2009-01-14T22:53:28Z

On Wed, 14 Jan 2009, Eric W. Biederman wrote:
> Jon Masters <jcm@redhat.com> writes:
>
> Which leads me to conclude.
> - IRQ handling in the RT kernel is hopelessly broken.
> - IRQ threads are a bad idea.

I would rephrase that to

-- boot interrupts are hopelessly broken

>
> Because it is all leading to stupid patches and stupid development.

Hmm, WTF should we have maskable interrupts for anyway? Sounds like broken
hardware design to me.

>
> None of this works reliably on level triggered ioapic irqs.
>

I guess this means that ioapic's are not for RTOS of any kind.

-- Steve