From owner-freebsd-mobile Sun Jun 23 10:48:12 2002 Delivered-To: freebsd-mobile@freebsd.org Received: from rover.village.org (rover.bsdimp.com [204.144.255.66]) by hub.freebsd.org (Postfix) with ESMTP id A57F537B400 for ; Sun, 23 Jun 2002 10:48:01 -0700 (PDT) Received: from harmony.village.org (harmony.village.org [10.0.0.6]) by rover.village.org (8.11.3/8.11.3) with ESMTP id g5NHm0Y70640; Sun, 23 Jun 2002 11:48:00 -0600 (MDT) (envelope-from imp@village.org) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.11.6/8.11.6) with ESMTP id g5NHlxG44382; Sun, 23 Jun 2002 11:47:59 -0600 (MDT) (envelope-from imp@village.org) Date: Sun, 23 Jun 2002 11:47:49 -0600 (MDT) Message-Id: <20020623.114749.82102391.imp@village.org> To: tony@saign.com Cc: bat@lists.dachb0den.com, freebsd-mobile@FreeBSD.ORG Subject: Re: tty-level buffer overflows? From: "M. Warner Losh" In-Reply-To: <3D152521.1080500@saign.com> References: <3D152521.1080500@saign.com> X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-mobile@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org In message: <3D152521.1080500@saign.com> Tony Saign writes: : Running FreeBSD 4.6 -stable on an IBM T20 : GPS Garmin eTrex set to NMEA @ 4800 : GpsDrive 1.22 from ports (very cool program) : Dstumbler doesn't have any problems reading the GPS : : Console flooded while GpsDrive is running with line after line; : : /kernel: si0 424 more tty-level buffer overflows (total 155242) : /kernel: si0 111 more tty-level buffer overflows (total 155353) : : Anyone seen this behaviour before? Do I have to reconfigure my com port?? tty-level buffer overflows are not caused by problems in the sio driver (this are fifo overflows). Instead, they are caused by a program having the tty open, characters flowig in, but the program doesn't read the data fast enough to empty the kernel ("tty") buffers, so the driver has no choice but to drop the characters on the floor. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message