*BSD News Article 22660


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From: bhiksha@tifrvax.tifr.res.in
Subject: RE: NETBSD 0.9 SPONTANEOUSLY REBOOTS WHEN DOING A LOT OF NFS READS
Message-ID: <21OCT93.07072268@tifrvax.tifr.res.in>
Sender: news@dxcern.cern.ch (USENET News System)
Organization: MIT PLASMA FUSION CENTER
References: <2a471k$shn@darkstar.UCSC.EDU>
Date: Thu, 21 Oct 1993 07:07:22 GMT
Lines: 31

In a previous article, buhrow@cats.ucsc.edu (Brian Buhrow) wrote:
> 
>	Hello fellow NetBSD people.  I have a bug which manifests itself when
>doing large reads from nfs mounted file systems.  If you do a lot of fast
>reading from a file on an nfs mounted file system, the netBSD system will
>spontaneously reboot.  I cannot figure out exactly what is going on, though
>I believe that the syslog message saying:
>hostname/netbsd: mb_map full
>which appears anywhere from 3 seconds to three minutes before the reboot
>might give a clue to the problem.  
>Note that it seems to happen only on large individual files, not on a lot
>of reads from a set of different files.  
> 
>	I'm using a netbsd-0.9a (current) kernel dated October 9, 1993.  It
>contains the nfs read-ahead patches.
>This bug predates those patches.
>The system is running on a 386DX/25 with 8MB of memory.
> 
>	Any suggestions,  patches, or ways of tracking the problem further
>would be most useful.  
>Please mail responses to:
>buhrow@cats.ucsc.edu
>as I do not have time to read news groups extensively.
>-Brian


I have had a similar thing happen on occasion when i read a lot of data
from the DOS partition on the SAME disk (not NFS).
Any idea why?

bhiksha