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From: "Daniel Eriksson" <daniel_k_eriksson@telia.com>
To: "'John Baldwin'" <jhb@freebsd.org>, <cvs-src@freebsd.org>
Date: Tue, 13 Jul 2004 23:36:17 +0200
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Subject: RE: cvs commit: src/sys/kern sched_4bsd.c
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John Baldwin wrote:

>   Set TDF_NEEDRESCHED when a higher priority thread is scheduled in
>   sched_add() rather than just doing it in sched_wakeup().  The old
>   ithread preemption code used to set NEEDRESCHED=20
> unconditionally if it
>   didn't preempt which masked this bug in SCHED_4BSD.

Does this mean it should be safe to turn preemption back on in param.h =
(for
a kernel using SHED_4BSD)? Or is this not related to the hard hangs =
reported
over the last week?

/Daniel