From owner-freebsd-current  Fri Sep 25 13:30:06 1998
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To: mike@smith.net.au
Cc: fn@radio-do.de, freebsd-current@FreeBSD.ORG, freebsd-smp@FreeBSD.ORG
Subject: Re: Weired top display at smp current kernel from today 
From: Tor.Egge@fast.no
In-Reply-To: Your message of "Thu, 24 Sep 1998 23:20:08 -0700"
References: <199809250620.XAA00529@word.smith.net.au>
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Date: Fri, 25 Sep 1998 22:24:58 +0200
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> Sounds like a bug in the ELF image activator.  It's possible that 
> something got bent when the corefile writing code went in (waves dead 
> poultry speculatively).

It is a bug in cpu_fork().  

pcb_mpnest should be initialized to 1.

Index: vm_machdep.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/i386/vm_machdep.c,v
retrieving revision 1.109
diff -u -r1.109 vm_machdep.c
--- vm_machdep.c	1998/08/18 07:46:58	1.109
+++ vm_machdep.c	1998/09/25 20:22:52
@@ -636,6 +649,9 @@
 	 * pcb2->pcb_onfault:	cloned above (always NULL here?).
 	 */
 
+#ifdef SMP
+	pcb2->pcb_mpnest = 1;
+#endif
 #ifdef VM86
 	/*
 	 * XXX don't copy the i/o pages.  this should probably be fixed.

- Tor Egge

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