From hsu@clinet.fi  Sun Sep 29 18:40:22 1996
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Date: Mon, 30 Sep 1996 04:40:07 +0300 (EET DST)
From: Heikki Suonsivu <hsu@clinet.fi>
Reply-To: hsu@clinet.fi
To: FreeBSD-gnats-submit@freebsd.org
Subject: Page fault while in kernel modem fatal trap 12 (double panic)
X-Send-Pr-Version: 3.2

>Number:         1692
>Category:       kern
>Synopsis:       Page fault while in kernel modem fatal trap 12 (double panic)
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Sep 29 18:50:01 PDT 1996
>Closed-Date:    Sat May 30 13:41:37 PDT 1998
>Last-Modified:  Sat May 30 13:42:15 PDT 1998
>Originator:     Heikki Suonsivu
>Release:        FreeBSD 2.2-CURRENT i386
>Organization:
Clinet, Espoo, Finland
>Environment:

	Several systems used as terminal/modem servers.  These are
	connected to modems (V34), using cyclades serial boards.
	Hardware varies, 486-100/120, VLB or PCI, or Pentium 90 (Asustek MB).

	The machines only run pppd or rlogin and gated for routing.

>Description:

	Systems panic and often lock up with

	Page fault while in kernel mode

	fatal trap 12

	these are almost always double panics (probably always, but
	we never get a crash dump so we do not really know).

	Problems increase with the number of modems, but this is not a
	clear rule; sometimes machines with less than 16 modems are
	unstable.

	We do not see this with machines which serve leased lines with
	exactly the same configuration, so this probably has something
	to do with modems, either with lines going up and down, or
	modem flow control (leased lines are usually with no flow control).

	This problem has been there for ages, from 2.1 days, probably it
	has always existed.  I think I have filed this before, but could
	not find a reference, so I assume if I did it got lost.

>How-To-Repeat:

	Build FreeBSD based terminal/modem server with cyclades boards
	and stack up to 32 modems into it.

>Fix:
	


>Release-Note:
>Audit-Trail:

From: Heikki Suonsivu <hsu@clinet.fi>
To: freebsd-gnats-submit@freebsd.org
Cc:  Subject: kern/1692 Page fault while in kernel modem fatal trap 12 (double panic)
Date: Sat, 28 Mar 1998 04:35:17 +0200 (EET)

 This is duplicate of PR I-cannot-remember-which-one.  Problem is still
 there, as far as I know.
 
 Studded@dal.net writes:
  > Greetings, :)
  > 
  > 	I am writing to you in regards to your FreeBSD Problem
  > Report. The FreeBSD project is currently conducting a beta test on
  > version 2.2.6 and feedback as to whether you are still experiencing
  > your problem would be very valuable. 
  > 
  > 	If you are still experiencing the problem you reported, it
  > would help the project track the problem if you could upgrade to the
  > latest snapshot of 2.2.6-Beta (located at releng22.freebsd.org) and
  > test your problem again. 
  > 
  > 	If you have any feedback regarding this Problem Report,
  > whether you are still experiencing the problem or whether the PR can
  > be closed, please mail your response to
  > freebsd-gnats-submit@freebsd.org. Please do not respond directly to
  > me. I am merely a humble volunteer and have no official connection to
  > the FreeBSD project. Therefore I cannot make any changes to the status
  > of your Problem Report. It is also very important that you include 
  > the category and number of your Problem Report (kern/1692)
  > in the subject line of your response.
  > 
  > 	Another option if you need a refresher on the details of your
  > problem or would like to submit a followup is to use the web page
  > interface and look up your PR by number.
  > http://www.freebsd.org/cgi/query-pr-summary.cgi
  > 
  > 	Thank you for helping to make this the greatest release of
  > FreeBSD ever.
  > 
  > Doug
  > 
  > 
  > -- 
  > ***         Chief Operations Officer, DALnet IRC network       ***
  > *** Proud operator, designer and maintainer of the world's largest
  > *** Internet Relay Chat server.  5,328 clients and still growing.
  > *** Try spider.dal.net on ports 6662-4    (Powered by FreeBSD)
  > 
State-Changed-From-To: open->closed 
State-Changed-By: steve 
State-Changed-When: Sat May 30 13:41:37 PDT 1998 
State-Changed-Why:  
Duplicate of PR #1293 I believe. 
>Unformatted:
