Date: Mon, 5 Mar 2001 01:26:56 -0500 From: "Robert S. Wojciechowski Jr." <robertw@wojo.com> To: <freebsd-stable@FreeBSD.ORG> Subject: Re: Silo overflows Message-ID: <16DC0F334516F5478EC60CADEDB6A68410D9A0@moe.wojo.net>
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Same problem here with two PIII 800mhz with serial consoles between the = two. It's quite annoying. Something is definitely broken in the serial code.=20 --- Robert S. Wojciechowski Jr. robertw@wojo.com ----------------------------------------------------------------- > On 04-Mar-2001 02:14:25, Rich Wales writes: > I'm running 4.2-RELEASE on an 800-MHz Athlon system. One of the > serial ports on this machine is connected to the serial console port > on a second machine (my home firewall/bridge, running 4.2-STABLE). >=20 > The firewall's serial console speed is set to 115200. The builtin > serial ports on both machines are 16550A's. >=20 > I'm getting lots and lots of silo overflows on the Athlon when I > generate a large amount of output from the firewall (e.g., if I do > "ls -ls", the output is badly garbled, and I get kernel messages on > the Athlon about silo overflows). >=20 > The Athlon's serial port (sio1) is using IRQ 3, and is =3Dnot=3D = sharing > this IRQ with any other hardware on the system. >=20 > I've tried patching isa/sio.c to set a lower receive FIFO threshold, > but even with a threshold of FIFO_RX_MEDL, I still get silo overflows > unless I reduce the console speed to 19200 or slower. >=20 > I'm really surprised that I should be getting silo overflows on an > 800-MHz Athlon -- which, I would think, should have plenty of = computing > power available to handle serial interrupts without losing any input. >=20 > It works flawlessly, BTW, if I run Win98 on the Athlon and connect to > the firewall via Hyperterm -- so I assume the problem is in the = FreeBSD > serial port driver, and not in my hardware. >=20 > I understand this "silo overflow" problem has been around for a long > time, but I wanted to bring it up again to make sure it wouldn't be > forgotten and would (hopefully) get fixed. >=20 > Rich Wales richw@webcom.com = http://www.webcom.com/richw/ >=20 >=20 > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message >=20 >=20 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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