From owner-freebsd-stable  Sun Oct  4 13:46:57 1998
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id NAA24503
          for freebsd-stable-outgoing; Sun, 4 Oct 1998 13:46:57 -0700 (PDT)
          (envelope-from owner-freebsd-stable@FreeBSD.ORG)
Received: from implode.root.com (implode.root.com [198.145.90.17])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id NAA24421
          for <freebsd-stable@FreeBSD.ORG>; Sun, 4 Oct 1998 13:46:34 -0700 (PDT)
          (envelope-from root@implode.root.com)
Received: from implode.root.com (localhost [127.0.0.1])
	by implode.root.com (8.8.5/8.8.5) with ESMTP id NAA00224;
	Sun, 4 Oct 1998 13:45:51 -0700 (PDT)
Message-Id: <199810042045.NAA00224@implode.root.com>
To: "Morgan Davis" <mdavis@cts.com>
cc: freebsd-stable@FreeBSD.ORG
Subject: Re: KERNEL PANICS in 2.2.7-RELEASE server 
In-reply-to: Your message of "Thu, 01 Oct 1998 15:24:43 PDT."
             <003b01bded8a$499df3c0$b617a3cd@ctsd2.cts.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Sun, 04 Oct 1998 13:45:50 -0700
Sender: owner-freebsd-stable@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

>The machine is a Pentium II 266MHz with 256MB RAM, and pumps out 2.5 MB/s
>(that's mega_bytes_) via an Intel EtherExpress in 100BaseT mode.  This
>server was just upgraded from 2.2.6-RELEASE to 2.2.7-RELEASE (including a
>newly built kernel based chiefly on GENERIC), and ever since it exhibits
>these intermittent panics:
>
>Fatal trap 12: page fault while in kernel mode
>fault virtual address	= 0x18
>fault code			= supervisor write, page not present
>instruction pointer	= 0x8:0xf011e3d1
>stack pointer		= 0x10:0xefbffe9c
>frame pointer		= 0x10:0xefbffec0
>code segment		= base 0x0, limit 0xfffff, type 0x1b
>				= DPL 0, pres 1, def32 1, gran 1
>processor eflags		= interrupt enabled, resume , IOPL = 0
>current process		= 501 (pnserver)
>interrupt mask		=
>panic: page fault
>
>The panics seem to occur during periods of high activity after running for a
>couple of hours.  Otherwise, it appears to operate fine.  Prior to the Intel
>card, it was running an SMC Rev C (de driver) card that was even more
>sensitive and paniced frequently.  I'm considering reverting back to 2.2.6
>unless there is a known issue with 2.2.7-RELEASE that has been resolved
>in -stable.  Or maybe there is no some new kernel tweaks required in 2.2.7
>to avoid this?
>
>Any assistance is much appreciated.

   It would help a bunch if you could tell us what functions are around
the instruction pointer above (f011e3d1)...use nm /kernel | sort | more.
It kind of looks like you might be running out of mbuf clusters. You might
try increasing them and see if it helps.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message