On 21-2-2014 9:20, quikcj...@gmail.com 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.
A long, long time ago (with the original BeagleBone) I tried this, but
ran into problems with the NIC driver. There's probably a reason it's
not enabled by default! Feel free to try though, maybe some problems
have been fixed since then.
-- Bas
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?
--
For more options, visit http://beagleboard.org/discuss
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