Hi, i have a similar interest, partly for audio work (which doesn't require hard RT) and partly because i want to try to use a Pi for controlling a reprap.
I haven't tried the wheezy image yet, but just downloaded it, and will have a look tonight.
I am running an audio-"RT" 3.2 kernel on my desktop (from KX Studio). I know it's an entirely different beast, but some of the kernel config may be helpful (i just grepped the config for PREEMPT):
Code: Select all
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT__LL is not set
# CONFIG_PREEMPT_RTB is not set
# CONFIG_PREEMPT_TRACER is not set
I haven't even thought about recompiling the kernel yet (got my Pi yesterday
), but it should be doable. If noone beats me too it, i may give it a shot. Although don't hold your breath, it may be quite a while, and my previous experiences with cross-compiling haven't been very happy...
PS it may be possible to extract the config from the running kernel, but i doubt that feature is enabled on the pi.
Edit: It's actually referenced in the cross-compile instructions, this should give you the current config in a file: