Threaded interrupts and preemption

[Alessio Igor Bogani]

Chase,

2010/4/13 Chase Douglas <chase.douglas at canonical.com>:
[...]
>>> I think it would be fun to have an
>>> RT completely preemptible kernel just so we can try it out and have a
[...]
>> sudo apt-get install linux-rt
>
> As far as I know, our -rt isn't what everyone else means when they say
> RT. Our rt flavor just has full preemption and a higher tick rate.
> That's nothing compared to what is in the RT patch set maintained by
> tglx at http://www.kernel.org/pub/linux/kernel/projects/rt/. The
> biggest changes that I'm aware of is the default threaded irq handlers
> and complete preemption in his patch set. Ubuntu kernels since at
> least Karmic have had threaded irq handlers, but the driver has to be
> reworked for it.

You are wrong.

The linux-rt package, since Feisty Fawn, contains kernel based on Ingo
Molnar, Thomas Gleixner and others works (that is
http://www.kernel.org/pub/linux/kernel/projects/rt/).

Ciao,
Alessio