Date: Thu, 29 May 2003 08:23:08 -0700 From: Kent Stewart <kstewart@owt.com> To: Fergus Cameron <fergus@cobbled.net>, questions@freebsd.org Subject: Re: SIO buffer overflows Message-ID: <200305290823.08884.kstewart@owt.com> In-Reply-To: <20030522150837.GA3250@pooh.cobbled.net> References: <20030522150837.GA3250@pooh.cobbled.net>
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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
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