HEADSUP: Native preemption added to the kernel scheduler

[David Wolfskill]

>Date: Sat, 03 Jul 2004 10:52:07 -0500
>From: "Thomas T. Veldhouse" <veldy at veldy.net>
>To: Steve Kargl <sgk at troutmask.apl.washington.edu>
>Cc: src-committers at freebsd.org
>Cc: current at freebsd.org
>Cc: cvs-src at freebsd.org
>Cc: cvs-all at freebsd.org
>Cc: Kris Kennaway <kris at obsecurity.org>
>Subject: Re: HEADSUP: Native preemption added to the kernel scheduler
>Sender: owner-freebsd-current at freebsd.org

[Recipient list trimmed a little....  :-}  dhw]

>Steve Kargl wrote:

>>--- sched_ule.c.orig    Sat Jul  3 07:51:02 2004
>>+++ sched_ule.c Sat Jul  3 07:51:15 2004
>>@@ -1716,7 +1716,7 @@
>>        kseq_load_rem(KSEQ_CPU(ke->ke_cpu), ke);
>>        kseq_notify(ke, cpu);
>>        /* When we return from mi_switch we'll be on the correct cpu. */
>>-       mi_switch(SW_VOL);
>>+       mi_switch(SW_VOL, NULL);
>> #endif
>> }


>No such problem.  I simply added NULL myself, by hand.  It compiles 
>fine, but the kernel panics on boot.

>Tom Veldhouse

I also added it by hand, but did not observe the panic:

freebeast(5.2-C)[1] uname -a
FreeBSD freebeast.catwhisker.org 5.2-CURRENT FreeBSD 5.2-CURRENT #6: Sat Jul  3 08:56:29 PDT 2004     root at freebeast.catwhisker.org:/common/S4/obj/usr/src/sys/FREEBEAST  i386
freebeast(5.2-C)[2] 

(This is on my SMP (2xPIII) machine.)

(And no, I didn't try compiling with -O2.)

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
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