Re: 2.6 must-fix list, v2

Steven Cole
2003-05-14T12:58:34Z

On Wed, 2003-05-14 at 05:49, Shaheed R. Haque wrote:
> Quoting Steven Cole <elenstev@mesatop.com>:
>
> > Is this related or not to processor shielding used by RedHawk Linux?
> > Here is a link to their page:
> >
> > http://www.ccur.com/realtime/sys_rdhwklnx.html
> >
> > I saw a presentation by these guys over a year ago. I'm not sure what
> > they're up to now.
>
> Yes, if I correctly read the description of this feature, it seems to be the
> same thing.
>
Thanks, that is what I suspected.

There seemed to be quite a bit of interest in this from the other
customers, although our facility doesn't presently need this
functionality. In the spirit of the "squeaky wheel", I'll squeak softly
for them.

>From the above web page, thus quoth the RedHawk:

"In tightly-coupled symmetric multiprocessing systems such as
Concurrent’s iHawk real-time systems, RedHawk Linux allows individual
CPUs to be shielded from interrupt processing, daemons, bottom halves,
and other Linux tasks. Processor shielding provides a highly
deterministic execution environment where interrupt response is
guaranteed. RedHawk implements shielding via the industry-accepted
shield(1) command."

Steven