From owner-freebsd-current Wed May 7 06:46:58 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id GAA22887 for current-outgoing; Wed, 7 May 1997 06:46:58 -0700 (PDT) Received: from abby.skypoint.net (abby.skypoint.net [199.86.32.252]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id GAA22881 for ; Wed, 7 May 1997 06:46:52 -0700 (PDT) Received: (from uucp@localhost) by abby.skypoint.net (8.8.5/alexis 2.7) with UUCP id IAA21269; Wed, 7 May 1997 08:46:45 -0500 (CDT) Received: (from bruce@localhost) by zuhause.mn.org (8.8.5/8.8.5) id IAA00221; Wed, 7 May 1997 08:43:59 -0500 (CDT) Date: Wed, 7 May 1997 08:43:59 -0500 (CDT) Message-Id: <199705071343.IAA00221@zuhause.mn.org> From: Bruce Albrecht To: Michael Smith Cc: freebsd-current@FreeBSD.ORG Subject: Re: Excessive tty-level buffer overflows In-Reply-To: <199705070503.OAA18220@genesis.atrad.adelaide.edu.au> References: <199705070407.XAA14409@zuhause.mn.org> <199705070503.OAA18220@genesis.atrad.adelaide.edu.au> X-Mailer: VM 6.22 under 19.15p2 XEmacs Lucid Mime-Version: 1.0 (generated by tm-edit 7.106) Content-Type: text/plain; charset=US-ASCII Sender: owner-current@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Michael Smith writes: > Bruce Albrecht stands accused of saying: > > In a five minute period while running uucp via an external sportster > > 33K modem at 57.6 KB on /dev/cuaa1, I received over 123,000 tty-level > > buffer overflows. This is a dual CPU Pentium Pro Tyan ATX 1668, > > running in single CPU mode. What does this mean? Is it a shoddy > > 16550 emulation? My kernel is from Saturday, or thereabouts. > > Please read the sio(4) manpage, which explains what a tty-level > overflow is. > > I don't think it's the serial hardware, but you may have other > problems. True. But even though I was running a make world at the time, I don't think a Pentium Pro should not have been able to handle UUCP traffic at 57.6K.