From owner-freebsd-stable  Sun Nov 28 16:14:49 1999
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Date: Sun, 28 Nov 1999 19:13:02 -0500
To: Joe Greco <jgreco@ns.sol.net>
From: Mike Tancsa <mike@sentex.net>
Subject: mmap bugs (was Re: ahc problems (with vinum?))
Cc: stable@FreeBSD.ORG, mcgovern@spoon.beta.com
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At 02:45 PM 11/28/99 , Joe Greco wrote:
>I have certainly beat the $#!+ out of these systems in a variety of ways,
>and have run into some odd things.  Most were traceable to SCSI issues.
>Some didn't get classified.  I'm running vinum in a ten-filesystem config
>on top of the 18 18GB drives, and I copy in data from another machine.  I
>then have an application which mmap()'s the files, doing search and replace
>ops on the data.  Running this app in parallel causes the system to hang
>(eventually causing the watchdog to expire and reset the system).  Running
>it serially on one fs at a time doesn't.  This is probably the most
>worrisome of the issues I've seen.  If you have a recommended revision of
>the ahc driver you'd like me to try, let me know.

Can you post more details of the mmap bug you have come across ?  It would
be nice if this were fixed for 3.4. mcgovern@spoon.beta.com is coordinating
testing of RCs for 3.4.  Perhaps this is a problem that someone could be
fix in time.

	---Mike
**********************************************************************
Mike Tancsa                       *  mike@sentex.net
Sentex Communications Corp,       *  http://www.sentex.net/mike
Cambridge, Ontario                *  519 651 3400
Canada                            *


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