Date: Thu, 4 Apr 1996 20:34:33 +0200 (MET DST) From: root@deadline.snafu.de (Andreas S. Wetzel) To: jgreco@brasil.moneng.mei.com (Joe Greco) Cc: jgreco@brasil.moneng.mei.com, current@freebsd.org Subject: Re: tty-level buffer overflows - what to do? Message-ID: <m0u4trd-000A0mC@deadline.snafu.de> In-Reply-To: <199604041821.MAA01616@brasil.moneng.mei.com> from Joe Greco at "Apr 4, 96 12:21:45 pm"
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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
--
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(@@) Andreas S. Wetzel E-mail: mickey@deadline.snafu.de
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