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Date: Tue, 04 Aug 1998 10:53:44 -0700
From: Julian Elischer <julian@whistle.com>
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To: Matthew Dillon <dillon@backplane.com>
CC: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>, current@FreeBSD.ORG,
        hag@ai.mit.edu
Subject: Re: Bizarre deadlock
References: <199808041713.KAA02861@apollo.backplane.com>
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Matthew Dillon wrote:
> 
> :was there any 'mount' operation going on?
> :there are some suspicious paths related to locking mounts and the root vn
> :
> :julian
> :
> 
>     I dunno re: garrett's box, but my test box running -current/SMP/SoftUpdates
>     locked up in a similar manner two weeks ago.  Definitely no mount op going
>     on.  I didn't get a dump, unfortunately.  The lockup occured when I tried
>     to do a 'df'.  That is, everything was fine until I did the 'df', and
>     that caused the machine to lockup (or perhaps the sync df does caused
>     the machine to lockup).
> 
>                                                         -Matt
> 
>     Matthew Dillon  Engineering, HiWay Technologies, Inc. & BEST Internet
>                     Communications
>     <dillon@backplane.com> (Please include original email in any response)


there once was a bug where df would crash the system as it did
an open on the device which did a  NON-IO operation on the drive which
preemted the IO operations
and forgot to restart them when it finished..
this was in sd.c but I would have expected to have heard of this
a lot more if this bug had resurfaced.

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