On Friday 17 August 2001 03:34, Calin Culianu wrote:
> Let's say your real-time thread were (erroneously) making use of some
> kernel services that could potentially block. (Like, oh, writing to a
> Linux fifo that might not have its buffers in memory, for instance).
>
> Could such cases cause the whole system to lock? Basically our
> real-time thread is non-preemptible (not even by hardware-interrupts)
> so we would never get out of the linux kernel routines that are
> blocking (since no interrupts would ever make their way in to any sort
> of interrupt handler both in RTL and in the regular kernel).
Actually, I think the exception handling would still work, and invoke the
swapper - although I'd rather not try it on my system to see what happens
after that... :-)
Either way, you don't have a hard real time system any more.
//David Olofson --- Programmer, Reologica Instruments AB
.- M A I A -------------------------------------------------.
| Multimedia Application Integration Architecture |
| A Free/Open Source Plugin API for Professional Multimedia |
`----------------------------> http://www.linuxdj.com/maia -'
.- David Olofson -------------------------------------------.
| Audio Hacker - Open Source Advocate - Singer - Songwriter |
`--------------------------------------> [EMAIL PROTECTED] -'
-- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
--
For more information on Real-Time Linux see:
http://www.rtlinux.org/
