Subject: Re: Terrible serial overruns
To: NetBSD/pmax List <port-pmax@NetBSD.ORG>
From: Michael L. Hitch <firstname.lastname@example.org>
Date: 02/18/1998 11:28:26
On Feb 17, 11:37pm, Trevor Schroeder wrote:
> I recently installed NetBSD 1.3 and have PPP running. However, I keep getting
> a number of silo overflows (hundreds or even thousands at a time) on scc0,0.
> I've got a Hayes Accura 33.6 and I've set my serial rate to 28800, 33600
> (which didn't work), 38400, and 57600. I've tried it with hardware flow
> control and without. I've used 250, 296, and 1500 for my MTU. Nothing seems
> to help. Every few seconds the line will just han while it straightens out
> the problem.
[A later message indicates this is on a 5000/25 - so I'm not suprised it
gets copious quantities of silo overflows.]
I'm not sure the serial driver even supports hardware flow control.
> Someboody please tell me there is a fix for this. I would occassionally get
Yes, there is a fix: rewrite the pmax handling of spl/interrupt levels,
and rewrite the serial driver :-)
Other than that, there's not much you can do.
Michael L. Hitch email@example.com
Information Technology Center
Montana State University Bozeman, MT USA