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Date: Mon, 24 Nov 2003 10:42:02 -0500 (EST)
From: Robert Watson <rwatson@freebsd.org>
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To: Divacky Roman <xdivac02@stud.fit.vutbr.cz>
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cc: current@freebsd.org
Subject: Re: panic in fridays current
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On Mon, 24 Nov 2003, Divacky Roman wrote:

> I upgraded from 5.1-RELEASE to current from 21st Nov about 10am CET... 
> after make world+kernel I noticed one kernel panic - I was working for
> about 45 minutes then loaded if_ep module, then it crashed... (after a
> short while)  28 ??  WL 0:04.61 (swi8: tty:sio clock) was the process
> reaching some NULL pointer (I suppose)  I was running vim + several tcsh
> sessions but all this was sleeping (I worked on another machine) 
> 
> previous instalation of 5.1-RELEASE havent crashed even once I compiled
> kernel+world with CPUTYPE = p2 and CFLAGS = -O -pipe nothing more
> 
> dont know what is this crashed related (can it be that turnstile
> problem?) to and havent' succeeded to reproduce it - anyone knows more
> about this?  My 3com NIC is pccard one

A stack trace and copy of the panic message would be extremely helpful. 
turnstiles are often implicated in a secondary panic following a page
fault, since an assertion fails in the turnstile code when it's invoked
from the VM code handling a page fault generated by the kernel.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Network Associates Laboratories