Subject: Re: SIMH runs NetBSD/vax
To: None <>
From: maximum entropy <>
List: port-vax
Date: 03/15/2002 17:38:41
>Date: Fri, 15 Mar 2002 22:53:22 +0100
>From: Olaf Seibert <>
>I notice that the idle loop in -current is shorter than in 1.5.x. The
>newer version is, I would say, much easier to detect because it is a
>very tight loop which should be fairly easy to detect:
>from sys/arch/vax/vax/subr.s,v 1.61 2002/02/10 22:06:45 thorpej Exp $
>1:	tstl	_C_LABEL(sched_whichqs)	# Anything ready to run?
>	beql	1b			# no, run the idle loop again.

This sequence is likely to change in the future.  If the page zeroing
code was ever fixed to be VAX-friendly (IIRC it used to cause random
crashes), I'd expect that code to be re-enabled at some point.

entropy -- it's not just a good idea, it's the second law.