Date: Thu, 4 Apr 1996 12:21:45 -0600 (CST) From: Joe Greco <jgreco@brasil.moneng.mei.com> To: root@deadline.snafu.de (Andreas S. Wetzel) Cc: jgreco@brasil.moneng.mei.com, current@freebsd.org Subject: Re: tty-level buffer overflows - what to do? Message-ID: <199604041821.MAA01616@brasil.moneng.mei.com> In-Reply-To: <m0u4svg-0009vMC@deadline.snafu.de> from "Andreas S. Wetzel" at Apr 4, 96 07:34:40 pm
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Hello, > 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).. > and a 210 Mb IDE hard drive. Ow. > 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. One of the nice things about kernel-mode SLIP is that no paging is involved.... ... Joe ------------------------------------------------------------------------------- Joe Greco - Systems Administrator jgreco@ns.sol.net Solaria Public Access UNIX - Milwaukee, WI 414/546-7968
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