Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.questions
Subject: Re: Increase serial line buffer
Message-ID: <2995@auspex.auspex.com>
Date: 7 Mar 90 20:18:26 GMT
References: <25620@ut-emx.UUCP>
Distribution: usa
Organization: Auspex Systems, Santa Clara
Lines: 10

>Can anyone tell me the way to do it?

You get the source to ".../sys/sundev/zs_async.c", change ZSIBUFSZ from
256 to some larger value, change the indices into the software silo from
"u_char" to some data type large enough to hold the new maximum value,
and add code after the code that bumps the indices to take them modulo
ZSIBUFSZ when they overflow ZSIBUFSZ.

Is the buffer overflowing (as indicated by "zsN: ring buffer overflow"
messages)?