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Path: utzoo!decvax!genrad!mit-eddie!godot!harvard!seismo!cmcl2!lanl!unmvax!lee
From: lee@unmvax.UUCP
Newsgroups: net.unix-wizards
Subject: 4.2, berknet and crashes
Message-ID: <564@unmvax.UUCP>
Date: Thu, 27-Dec-84 14:59:05 EST
Article-I.D.: unmvax.564
Posted: Thu Dec 27 14:59:05 1984
Date-Received: Fri, 28-Dec-84 14:23:54 EST
Distribution: net
Organization: Univ. of New Mexico, Albuquerque
Lines: 37

Subject: Berknet on a dh crashes the system
Index:	.../sys/h/bk.h
	    .../sys/vaxuba/dh.c .../sys/sys/tty.c .../sys/sys/tty_bk.c 4.2BSD

Description:
	We have two DH lines dedicated to berknet. These are used
	fairly heavily. The machine (a 780) cannot stay up for
	more than ten days. The crash is always on the line

	*tp->t_cp++ = c;

	at the instruction

	cvtlb	r10, *4(r11)

	in the BKINPUT macro from .../sys/h/bk.h

	No crash dumps are taken; nor are the disks synched. Just
	alot of "protection fault" panics and then a reboot.

	It looks like the buffer gets deallocated.
	However, I cannot find where this might be happening.

	We have other machines using berknet on DZ's and they have
	never had the problem. Strange...
Repeat-By:
	Got me!?




 Any help in, either the form of a fix or in modifying the routines
involved in a crash so that I can get a dump would be appreciated.

-- 
			--Lee (Ward)
			{ucbvax,convex,gatech,pur-ee}!unmvax!le

Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
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Path: utzoo!linus!philabs!cmcl2!seism...@csnet-relay.arpa
From: BostonU SysMgr <root%bostonu.csnet@csnet-relay.arpa>
Newsgroups: net.unix-wizards
Subject: Re:  4.2, berknet and crashes
Message-ID: <6817@brl-tgr.ARPA>
Date: Fri, 28-Dec-84 16:22:46 EST
Article-I.D.: brl-tgr.6817
Posted: Fri Dec 28 16:22:46 1984
Date-Received: Sat, 29-Dec-84 23:28:44 EST
Sender: ne...@brl-tgr.ARPA
Organization: Ballistic Research Lab
Lines: 13


Just as a vote of confidence, I too run a
780 4.2bsd w/ DHs. I put up berknet and
the system crashed almost immediately.
It was a while back and I didn't really
need it (I wrote a remote laser printer
spooler for our 20 over RS232 which
could take advantage of the berknet low
level stuff if it worked.)

I too would be interested in fixes etc.

	-Barry Shein, Boston University

Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!henry
From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: net.unix-wizards
Subject: Re:  4.2, berknet and crashes
Message-ID: <4848@utzoo.UUCP>
Date: Sun, 30-Dec-84 00:06:14 EST
Article-I.D.: utzoo.4848
Posted: Sun Dec 30 00:06:14 1984
Date-Received: Sun, 30-Dec-84 00:06:14 EST
References: <6817@brl-tgr.ARPA>
Organization: U of Toronto Zoology
Lines: 5

Don't get your hopes too high.  Somebody (George Goble??) at Salt Lake
said "the only fix for 4.2 Berknet is to unplug it".
-- 
				Henry Spencer @ U of Toronto Zoology
				{allegra,ihnp4,linus,decvax}!utzoo!henry