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Date: Wed, 07 May 1997 19:19:42 -0500
From: Alex Nash <nash@mcs.com>
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To: Bruce Albrecht <bruce@zuhause.mn.org>
CC: freebsd-current@FreeBSD.ORG
Subject: Re: Excessive tty-level buffer overflows
References: <199705070407.XAA14409@zuhause.mn.org>
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Bruce Albrecht wrote:
> >From my console log:
> May  6 21:56:58 zuhause /kernel: sio1: 1402 more tty-level buffer overflows (total 116883)
> May  6 21:56:59 zuhause /kernel: sio1: 2162 more tty-level buffer overflows (total 119045)
> May  6 21:57:08 zuhause /kernel: sio1: 4435 more tty-level buffer overflows (total 123480)
> May  6 21:57:13 zuhause /kernel: sio1: 142 more tty-level buffer overflows (total 123622)

I've noticed the same thing here after moving from 2.2 to 3.0-SMP.  
This message was present in 2.2, but I'd never seen it before -- 
I suspect the problem is related to the SMP kernel.  You might try
a 3.0-UP kernel to see if the problem goes away.

Alex