From owner-freebsd-current Thu Apr 4 10:34:44 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id KAA18145 for current-outgoing; Thu, 4 Apr 1996 10:34:44 -0800 (PST) Received: from cenotaph.snafu.de (root@deadline.berlin.netSurf.DE [194.64.158.25]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id KAA18136 for ; Thu, 4 Apr 1996 10:34:37 -0800 (PST) Received: by cenotaph.snafu.de from deadline.snafu.de using smtp id m0u4tpL-0002boC; Thu, 4 Apr 96 20:32:11 +0200 (MET DST) (/\##/\ Smail3.1.30.13 #30.1) Received: by deadline.snafu.de id m0u4trd-000A0mC; Thu, 4 Apr 96 20:34:33 +0200 (MET DST) (/\##/\ Smail3.1.30.13 #30.1) Message-Id: From: root@deadline.snafu.de (Andreas S. Wetzel) Subject: Re: tty-level buffer overflows - what to do? To: jgreco@brasil.moneng.mei.com (Joe Greco) Date: Thu, 4 Apr 1996 20:34:33 +0200 (MET DST) Cc: jgreco@brasil.moneng.mei.com, current@freebsd.org In-Reply-To: <199604041821.MAA01616@brasil.moneng.mei.com> from Joe Greco at "Apr 4, 96 12:21:45 pm" Organization: A world stranger than you have ever imagined. X-Mailer: ELM [version 2.4ME+ PL13] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Hi! --- Joe Greco writes: ] > The machine is a 486SX at 40 MHz ] ] Should be OK.. ] ] > with 4 Meg. RAM ] ] That's a little tight (I put 8 minimum in my boxes).. I plan to put in 8 Meg shortly but til then it has to live with the 4 Meg. I tried to install another Meg on 256k simms but didn't suceed cause the motherboard only recognizes one meg of memory when I put in the 256k simms additionally to the 4 meg. ] > and a 210 Mb IDE hard drive. ] ] Ow. Not very serious til now... the machine runs at about 40% diskspace used and about 10% swap used (of 40 Mb). ] > The serial ports used on the modems are all of type 16550A. RTS/CTS flow ] > control is hardwired for all modem lines. The machine has one dedicated ] > slip line as well as two dialup ports attached to it. The syslog messages ] > all seemed to related to the first dialup port which is a V34+ modem operated ] > at 115k2 bps. The mgetty on the dialup ports is configured to do a direct ] > rlogin onto another FreeBSD machine for all logins, so it just hands off ] > the dialup connections. ] ] My gut instinct is that you would find a correlation between your IDE disk ] going and these error messages. A 486/40 should be adequate, even for ] several lines at 115200. The fact that you are tight on memory would tend ] to cause you to hit the disk correspondingly more often, which would cause ] some burps in serial I/O... the fact that you're running rlogin also would ] tend to cause you to swap more, if you have a few active sessions. Maybe that happened while I was tormenting the machine with several rsh's from my other box. That seemed to make it swap really *heavily* :-) But another problem is still going on on that machine. During boot there are several occurences of "stray irq 7" messages until syslog says it would not log them anymore. I have no idea where this stray irq's should happen. Physically there is no adaptor card installed which could ever generate a IRQ 7 ? Possible that this has to do with the other thing? ] One of the nice things about kernel-mode SLIP is that no paging is involved.... The SLIP line does not seem to bother the machine. (Fortunately!) Regards, mickey -- (__) (@@) Andreas S. Wetzel E-mail: mickey@deadline.snafu.de /-------\/ Utrechter Strasse 41 Web: http://deadline.snafu.de/ / | || 13347 Berlin Voice: <+4930> 456 81 68 * ||----|| Germany Fax/Data: <+4930> 455 19 57 ~~ ~~