Date: Fri, 29 Oct 1999 09:06:06 -0400 (EDT) From: Peter Dufault <dufault@hda.com> To: freebsd-arch@freebsd.org Subject: Scheduler fixes Message-ID: <199910291306.JAA06778@hda.hda.com>
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I put scheduler patches up on Freefall for review. They're
in PATCHES.scheduler. Ignore everything in the posix1b directories
and just look at the sys/kern and sys/{i386,alpha} changes. This
doesn't directly address the recent alpha complaints yet, it is
just a revisit to the scheduler to get back up to speed.
I've also added "synch.9" to talk about what is in there.
In particular look at hoisting userret into machine indepedent. I
looked at 4.4Lite and I believe multiple arches can still be supported
cleanly while moving a lot of this stuff into mi code, maybe at the
cost of some per-arch "methods" passed in. Note that I've changed
the kernel priority level on the Alpha of userret to splhigh - everything
else is being done in the scheduler code at splhigh and that was pretty
much the only difference between alpha and i386 (other than i386 previously
being inline).
Note - I nuked my new "sys/sys/synch.h" header when creating patches,
so I quickly recreated it this morning and verified the kernel still
builds. If you notice anything funky about the headers that is why.
Peter
--
Peter Dufault (dufault@hda.com) Realtime development, Machine control,
HD Associates, Inc. Safety critical systems, Agency approval
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