rainbow and pam

[Benjamin M. Schwartz]

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victor wrote:
| Is that documented? I don't see it in man page. I can try it, if
| I have a code example (says there it does not take a priority
| value, so is it just a matter of setting the policy?)

Unfortunately, SCHED_ISO is only available in a patch by Con Kolivas, the
latest version of which is for 2.6.22.  It seems that no one has attempted
to maintain that patch for newer kernels.  Someone would have to put in
quite a bit of work to maintain it for newer kernels, though it appears
that the mainline scheduler authors would potentially like to include
SCHED_ISO functionality.

I also noticed another new scheduler patch from just this week:
http://article.gmane.org/gmane.linux.kernel/719589 shows a new patch that
provides SCHED_SPORADIC, which appears to be a different sort of safe
real-time scheduler.  I am less familiar with it, though it is drawn
directly from the POSIX spec.

In any event, I think it is more practical to try to hunt down the
regression in the OLPC kernel than to attempt fancy real-time stuff.
Perhaps someone can assist Victor in a kernel bisection to find the change?

- --Ben
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