Steve Deiters wrote: > Even more of a problem is how I am supposed to know which calls are > similar to this. I would expect I could call any Linux service without > causing a deadlock/livelock situation, although in a nondeterministic > manner. If I understood your explanation correctly, this is hanging > whenever the Xenomai task tries to spin on the same lock as the kernel. > However, I don't see how this is not a problem in general for acquiring > any spinlock from a Xenomai task. I would expect once you introduce a > priority based scheduler any spinlock becomes unsafe.
The set of services which you can call from a real-time thread without loosing determinism are those found in the Xenomai posix skin documentation: http://www.xenomai.org/documentation/xenomai-2.5/html/api/group__posix.html Other than that, any service emitting a syscall causes a switch to secondary mode. What remains are services not emitting syscalls, and for these ones, all bets are off. -- Gilles. _______________________________________________ Xenomai-help mailing list Xenomai-help@gna.org https://mail.gna.org/listinfo/xenomai-help
