On Wed, May 17, 2000 at 12:18:12AM -0700, wrote:
> Hi,
>
> I understand from the FAQ that the standard RTLinux is not burdened
> with the overhead of supporting priority inheritance.
> http://www.rtlinux.org/rtlinux.new/documents/faq.html#Q10
>
> The RTLinux mailing list seems to indicate that the RTAI variant does
> support priority inheritance (URL below may be split across lines).
> http://www.rtlinux.org/rtlinux.new/mailing_list/rtl.w5archive/9909/msg00041.html
>
> If you have experience with current RTLinux priority inheritance
> implementations and other scheduling matters, you may be able to
> provide insight addressing the following question...
> http://www.hotdispatch.com/view-task-provider?ID=1835181&aff=32819422
Basically, my analysis is that if you "rely heavily on priority inheritance"
to solve your synchronizationm processes, you need a redesign or you
(more likely) should not be running in RT space.
One simple method for solving semaphore induced priority inversion in RTLinux
is to disable thread switching while semaphores are held. In fact,
I'd be willing to add this an an option to the mutex code if people
wanted it.
>
> Thanks,
>
> --- jvwright
>
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