On Mon, Dec 03, 2001 at 05:03:27PM -0800, Robert Kavaler wrote:
> You can think of the non-rt kernel as the idle task for the rt kernel.
> So, you can use all of the rt fifo commands without any problems
> (rtf_put, rtf_get, the posix interface, etc.), you just may get
> preempted by rt kernel since you are the low priority guy. Note the the
> fifo stuff is designed to handle preemption since it hard disables
> interrupts. I use fifos in the kernel all the time interfacing to the
> networking code.
Is this strictly true? Given that the kernel _is_ the lowest-
priority RT-task, it should be, but I seem to recall some caveats
regarding not being able to call certain RT-Linux routines from the
(non-RT) kernel. (One example: pthread_wakeup_np()).
Regards,
Eric
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