[linux-audio-dev] HELP:porting linux audio driver to RTLinux(rtlinux core driver)

[Jack O'Quin]

Lee Revell <rlrevell at joe-job.com> writes:

> Basically the RT preempt kernel achieves determinism by making every
> code path in the kernel preemptible, except for a few like the scheduler
> (and timer ISR, for now) that fundamentally can't be made preemptible,
> and those few code paths can be analyzed to ensure that they execute in
> constant time.  This is achieved by turning all spinlocks into priority
> inheriting mutexes.

That's interesting, I didn't know that.  So, it seems Ingo's patchset
really *is* hard-RT.

> It's still not considered ready for prime time, but this is definitely
> the direction that hard RT on Linux is moving.  It definitely appears
> that this will obsolete RTLinux (and MontaVista Linux, eventually).

I'll be surprised to see full hard-RT integrated into the base kernel.
But, maybe as a Kconfig option some day.

Meanwhile, keep up the good work...
-- 
  joq