*BSD News Article 39760


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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msunews!agate!violet.berkeley.edu!jkh
From: jkh@violet.berkeley.edu (Jordan K. Hubbard)
Newsgroups: comp.os.386bsd.questions
Subject: Re: BT946C problem with NetBSD 1.0
Date: 20 Dec 1994 03:38:41 GMT
Organization: University of California, Berkeley
Lines: 14
Message-ID: <3d5jk1$d0r@agate.berkeley.edu>
References: <3d5gg7$3b6@titania.pps.pgh.pa.us> <MICHAELV.94Dec19212522@mindbender.headcandy.com>
NNTP-Posting-Host: violet.berkeley.edu

In article <MICHAELV.94Dec19212522@mindbender.headcandy.com>,
Michael L. VanLoon <michaelv@MindBender.HeadCandy.com> wrote:
>This looks like cache coherency problems.  If you have write-back
>caching, try to use it in write-through mode and see if this makes the
>problem go away.  If that still doesn't help, try disabling caching
>altogether, and see if that helps.

Actually, it has nothing to do with cache coherency.  It's a state in the
driver where a free mailbox couldn't be found in the round-robin queue,
and it can happen under heavy load.  Fortunately, the driver recovers
gracefully so you can treat it as nothing more than a warning..

					Jordan