From owner-freebsd-hackers Sun Aug 3 01:52:52 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id BAA14348 for hackers-outgoing; Sun, 3 Aug 1997 01:52:52 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id BAA14341 for ; Sun, 3 Aug 1997 01:52:48 -0700 (PDT) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.5/8.7.3) id SAA13473; Sun, 3 Aug 1997 18:22:34 +0930 (CST) From: Michael Smith Message-Id: <199708030852.SAA13473@genesis.atrad.adelaide.edu.au> Subject: Re: tty-level buffer overflows In-Reply-To: <19970803025730.57257@crh.cl.msu.edu> from Charles Henrich at "Aug 3, 97 02:57:30 am" To: henrich@crh.cl.msu.edu (Charles Henrich) Date: Sun, 3 Aug 1997 18:22:34 +0930 (CST) Cc: tom@sdf.com, freebsd-hackers@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Charles Henrich stands accused of saying: > > > Generally the above is caused by a poor UART, and and an overloaded CPU. > > Not in this case, its a 16550A, on a 486/66 doing absolutely nothing except > trying to do filetransfer over the serial port with a custom app I wrote.. And of course if you bothered to read the sio(4) manpage it would tell you what the error message means. Or if you'd mentioned that you're using a custom appliction talking to the serial port it might have been possible to give you an answer sooner. Your application is busted; data is arriving faster than your app is reading it, and the kernel has run out of patience and started throwing the data away. > Charles Henrich Michigan State University henrich@msu.edu -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[