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Re: [realtime] RT-Linux / RTAI and priorty ceilling
- To: Andreas Schreckenberg <ASchreckenberg@dspace.de>
- Subject: Re: [realtime] RT-Linux / RTAI and priorty ceilling
- From: yodaiken@fsmlabs.com
- Date: Sun, 8 Apr 2001 16:59:54 -0600
- Cc: rtl@rtlinux.org
- In-Reply-To: <3AC9C6E3.284ECECF@dspace.de>; from ASchreckenberg@dspace.de on Tue, Apr 03, 2001 at 02:49:39PM +0200
- References: <3AC84F80.72216460@dspace.de> <01040222072906.26026@boy> <3AC96764.65D049E4@opersys.com> <3AC98C52.DCE59EE4@lineo.com> <3AC9C6E3.284ECECF@dspace.de>
- User-Agent: Mutt/1.2i
On Tue, Apr 03, 2001 at 02:49:39PM +0200, Andreas Schreckenberg wrote:
> Standards like OSEK/VDX in the automotive
> environment prescribe the priority ceilling protocol !
In fact, priority ceiling in a simple form is trivial to
implement and very old.
pc_mutex_lock
set priority
mutex_lock
etc.
This is done automatically in rtlinux semaphores to meet
POSIX requirements - although we do not implement the even more
terrible inheritance protocol.
There was a discussion on this on RTL.org a while back. If there
is interest, we can revive it.
>
> bye
> Andreas
> --
> Life's not fair. But the root password helps ! :-)
> http://schrecky.home.pages.de
> Open minds. Open sources. Open future.
--
---------------------------------------------------------
Victor Yodaiken
Finite State Machine Labs: The RTLinux Company.
www.fsmlabs.com www.rtlinux.com