From owner-freebsd-questions@FreeBSD.ORG Thu May 29 08:23:11 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6E8BB37B401 for ; Thu, 29 May 2003 08:23:11 -0700 (PDT) Received: from rutger.owt.com (rutger.owt.com [204.118.6.16]) by mx1.FreeBSD.org (Postfix) with ESMTP id B984D43F3F for ; Thu, 29 May 2003 08:23:10 -0700 (PDT) (envelope-from kstewart@owt.com) Received: from topaz-out (owt-207-41-94-233.owt.com [207.41.94.233]) by rutger.owt.com (8.11.6p2/8.9.3) with ESMTP id h4TFN9V21641; Thu, 29 May 2003 08:23:09 -0700 From: Kent Stewart To: Fergus Cameron , questions@freebsd.org Date: Thu, 29 May 2003 08:23:08 -0700 User-Agent: KMail/1.5.2 References: <20030522150837.GA3250@pooh.cobbled.net> In-Reply-To: <20030522150837.GA3250@pooh.cobbled.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200305290823.08884.kstewart@owt.com> Subject: Re: SIO buffer overflows X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 May 2003 15:23:11 -0000 On Thursday 22 May 2003 08:08 am, Fergus Cameron wrote: > i've been running BSD as a gateway on my old i486 > for a few years now and have just reconnected my > modem (was on DSL). unfortunately there > is a constant problem with sio buffer overflows. > > not surprising i hear you say as it's in the bugs > section of sio(4). > > still, the system is running 5.0 release well and > i'm reluctant to decomission it over something > trivial. anyone ideas on how to tune to eliminate > the overflows? failing that what version would i > need to drop back to 4, 3? i don't remember the > problem existing in late 4 (4.6-4.7) but cannot > verify 100% at the moment. > > i've attached the dmesg output including errors > from sio1@57600. the test was a simple -- tip to > the modem and then ati4 to generate enough output > for the overflow. > They used to make I/O cards for the like of 486's that had fully functional 16-byte FIFO's. I have some around but couldn't find them. When you turn on hardware controll, most of the errors go away. At least, this is the old memories. FWIW, I would worry about the improperly dismounted messages in dmesg more than the sio problem. Kent -- Kent Stewart Richland, WA http://users.owt.com/kstewart/index.html