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Date: Sat, 16 Sep 2000 23:01:06 +0200 (CEST)
From: Robert Joop <rj@rainbow.in-berlin.de>
Reply-To: rj@rainbow.in-berlin.de
To: FreeBSD-gnats-submit@freebsd.org
Subject: unexpected kernel panic due to lack of documentation
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>Number:         21316
>Category:       kern
>Synopsis:       unexpected kernel panic due to lack of documentation
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    gnats-admin
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Sep 16 13:10:00 PDT 2000
>Closed-Date:    Sat Sep 16 13:11:28 PDT 2000
>Last-Modified:  Wed Oct 26 06:27:07 GMT 2005
>Originator:     Robert Joop
>Release:        FreeBSD 4.1-STABLE i386
>Organization:
>Environment:

	see description

>Description:

	due to hardware problems, i switched the mainboard from a 486 to
	a pentium.
	the kernel that was configured for a 486 only refuses to work on
	a pentium, it panics with the message that it was configured for
	another CPU.
	the documentation in /usr/src/sys/i386/conf/LINT doesn't mention
	that fact, quite the opposite, it suggests to remove the other
	lines:

	  # You must specify at least one CPU (the one you intend to run on);
	  # deleting the specification for CPUs you don't need to use may make
	  # parts of the system run faster.  This is especially true removing
	  # I386_CPU.

	i find the freeBSD kernel's behaviour unexpected, linux kernels
	compiled for 486 run on pentium as well.

>How-To-Repeat:

	boot a "cpu             I486_CPU"-only kernel on a pentium.

>Fix:

	i had to swap the mainboard again and again to build another
	kernel.


>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed 
State-Changed-By: phk 
State-Changed-When: Sat Sep 16 13:11:28 PDT 2000 
State-Changed-Why:  
You changed the tyhpe of cpu you intended to run on, consequently 
you need to change the I*_CPU lines as well. 

Not a bug. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=21316 
>Unformatted:
