From owner-freebsd-hackers  Fri Jun  5 13:29:12 1998
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id NAA06393
          for freebsd-hackers-outgoing; Fri, 5 Jun 1998 13:29:12 -0700 (PDT)
          (envelope-from owner-freebsd-hackers@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 NAA06343
          for <hackers@FreeBSD.ORG>; Fri, 5 Jun 1998 13:28:50 -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 NAA09631;
	Fri, 5 Jun 1998 13:27:27 -0700 (PDT)
Message-Id: <199806052027.NAA09631@implode.root.com>
To: wayne@msen.com
cc: hackers@FreeBSD.ORG
Subject: Re: Page fault in kernel 
In-reply-to: Your message of "Fri, 05 Jun 1998 14:13:38 EDT."
             <m0yi0zi-0003cUC@ilium.troy.msen.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Fri, 05 Jun 1998 13:27:27 -0700
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

>Based upon the various charters, I assume this is the correct place to
>discuss kernel-level problems, if not I'm sure someone will correct me :-)
>
>We're looking at moving our Diablo-based nntp server from BSD/OS to
>FreeBSD.  Everything appears mostly OK, except that the machine reboots
>every 36 hours or so.  Did a bit of digging into the kernel and found
>that the MGETHDR at line 432 of kern/uipc_socket.c is returning with 
>m = 0, which obviously causes the problem two lines later when it's
>trying to be used.
>
>Before I go thrashing around trying to locate this, is this a known
>problem with a patch avail?

   That indicates that you've run out of mbuf clusters. You don't want to do
that. You can increase the number with the kernel option:

options "NMBCLUSTERS=<n>"

   Where <n> is a number that is several thousand. You can see the current
peak since the system was started with "netstat -m" (the second number in
the mbuf clusters ratio is the peak, not the limit).

-DG

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

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