From owner-freebsd-stable  Sun Jan 24 20:20:28 1999
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id UAA10931
          for freebsd-stable-outgoing; Sun, 24 Jan 1999 20:20:28 -0800 (PST)
          (envelope-from owner-freebsd-stable@FreeBSD.ORG)
Received: from nhj.nlc.net.au (nhj.nlc.net.au [203.24.133.1])
          by hub.freebsd.org (8.8.8/8.8.8) with SMTP id UAA10920
          for <freebsd-stable@freebsd.org>; Sun, 24 Jan 1999 20:20:25 -0800 (PST)
          (envelope-from john.saunders@nlc.net.au)
Received: (qmail 8811 invoked by uid 1000); 25 Jan 1999 15:20:12 +1100
From: "John Saunders" <john.saunders@nlc.net.au>
Date: Mon, 25 Jan 1999 15:20:12 +1100 (EST)
To: Heikki Suonsivu <hsu@clinet.fi>
cc: freebsd-stable@FreeBSD.ORG
Subject: Re: Kernel PPP tty-level buffer overflows
In-Reply-To: <x2n23b3on9.fsf@katiska.clinet.fi>
Message-ID: <Pine.LNX.3.95.990125151659.5992B-100000@nhj.nlc.net.au>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-stable@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

On 22 Jan 1999, Heikki Suonsivu wrote:

> > > > sio0: 815 more tty-level buffer overflows (total 4715)
> > > > sio0: 3093 more tty-level buffer overflows (total 7808)
> 
> You need to configure your kernel with
> 
> options "TTYHOG=4096"
> options "RS_IBUFSIZE=1024"

Done, although I doubled the numbers just to be sure. No errors since I
rebooted to the new kernel. Thanks for the tip, works well.

> and you need to patch sio.c to allow overriding RS_IBUFSIZE, as it is
> hardcoded (cyclades driver has the same problem, I think).

I've been running a cyclades 16Ye with all ports at 115200 (with 33.6K
modems though) on another machine and haven't had the problem. Although
this other machine has more than twice the CPU power.

Thanks.
--            +------------------------------------------------------------+
        .     | John Saunders  - mailto:john@nlc.net.au            (EMail) |
    ,--_|\    |                - http://www.nlc.net.au/              (WWW) |
   /  Oz  \   |                - 02-9489-4932 or 041-822-3814      (Phone) |
   \_,--\_/   | NHJ NORTHLINK COMMUNICATIONS - Supplying a professional,   |
         v    | and above all friendly, internet connection service.       |
              +------------------------------------------------------------+


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message