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Date:      Thu, 18 Nov 1999 01:46:03 -0500
From:      "David E. Cross" <crossd@cs.rpi.edu>
To:        Warner Losh <imp@village.org>
Cc:        "David E. Cross" <crossd@cs.rpi.edu>, freebsd-hackers@FreeBSD.ORG, crossd@cs.rpi.edu
Subject:   Re: AMD wedging 
Message-ID:  <199911180646.BAA57262@cs.rpi.edu>
In-Reply-To: Message from Warner Losh <imp@village.org>  of "Wed, 17 Nov 1999 23:14:08 MST." <199911180614.XAA21369@harmony.village.org> 

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> In message <199911180054.TAA48910@cs.rpi.edu> "David E. Cross" writes:
> : I have been noticing of late a disturbing trend of AMD wedging and
> : eventually taking the entire system down.  The WCHAN that it is locked in is
> : "sbwait".  I now have the luxury of having this happen on a non-critical
> : system with DDB compiled in (the system is the one I am typing on now).
> : How would I go about finding exactly what it is stuck on so I may correct
> : the bug in the kernel or amd?
> 
> -stable or -current?  If -stable, then there is a well known bug that
> prevents AMD from NFS mounting local file systems.  I have a kludge
> that is gross beyond words that I came up with, but haven't had a time

This is indeed -stable, but I do not believe that this is the bug.  For
one the machine does not have any NFS exports.  Another is that we have
'host==' and 'host!=' entries in our amd maps, host!= are NFS mounts, host==
are sym-links.

Strangely enough on this system it came back by itself.  I just needed to wait
30 minutes and *poof*, the problem went away.  Any ideas?

--
David Cross                               | email: crossd@cs.rpi.edu 
Acting Lab Director                       | NYSLP: FREEBSD
Systems Administrator/Research Programmer | Web: http://www.cs.rpi.edu/~crossd 
Rensselaer Polytechnic Institute,         | Ph: 518.276.2860            
Department of Computer Science            | Fax: 518.276.4033
I speak only for myself.                  | WinNT:Linux::Linux:FreeBSD


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