On Friday 21 February 2014 00:20:39 [email protected] wrote: > I am trying to figure out how to create a kernel for the BBB that supports > PREEMPT_RT. It's kind of strange that the BBB's default kernel does not > even have PREEMPT activated. Such a board doesn't fit to many embedded > applications where we need at least some kind of determinism. It is even > worse, that nobody seems to care about this problem. Contrary to that, the > Raspberry PI's standard kernel has PREEMPT activacted from the very > beginning. > > I have tested Robert Nelsons kernel 3.8.13-r9 > (https://github.com/beagleboard/kernel/tree/3.8-rt). It does not have > PREEMPT_RT activated by default. When doing so, it does not boot. But > activating PREEMPT does work. However, development of this branch has > stopped several months ago. The official source for RT Linux (3.8.13) has > evolved since then. Meanwhile there's an rt17 patch set > (https://www.kernel.org/pub/linux/kernel/projects/rt/3.8/). Did anybody > give this a try? Does it work with the BBB? Surely the point of the Beaglebone, or rather its processor, is that you do not need to put the time critical bits on the main processor, you put them in the PRUSS processors.
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