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Date:      Wed, 29 Mar 2000 20:41:03 +0200 (CEST)
From:      Bart van Leeuwen <bart@ixori.demon.nl>
To:        Dave Boers <djb@wit389306.student.utwente.nl>
Cc:        Matthew Dillon <dillon@apollo.backplane.com>, Tommy Hallgren <thallgren@yahoo.com>, Jeremiah Gowdy <jgowdy@home.com>, freebsd-smp@FreeBSD.ORG
Subject:   Re: SMP and vn
Message-ID:  <Pine.BSF.4.21.0003292036180.518-100000@isengard.ixori.demon.nl>
In-Reply-To: <20000329194959.B11743@relativity.student.utwente.nl>

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Hmm... after disabling the ATA_ENABLE_ATAPI_DMA and all pci nics in my
kernel (except for the 3c90x xl driver and the miibus that it requires, 
this was a change to my kernel config that I had planned for a little
while now..) I seem to be able to run xfree 3.3.6 + an opengl screensaver
without freezing my system within an hour (since january I haven't
been able to)... not a very reliable test and I'll have to try this more
then once, but it does seem to improve things at first glance.

After testing it a few times I'll try adding the devices one by one to see
if I can get any results that way.

Bart van Leeuwen
-----------------------------------------------------------
 mailto:bart@ixori.demon.nl  -  http://www.ixori.demon.nl/
-----------------------------------------------------------

On Wed, 29 Mar 2000, Dave Boers wrote:

> It is rumoured that Matthew Dillon had the courage to say:
> >     I suspect you are getting a panic, but due to X running you can't
> >     see it.  The goal should be to get to a DDB prompt on the console
> >     to be able to see the panic and 'trace' and 'ps', and then to 
> >     (if possible) get a kernel core by typing 'panic' from the DDB prompt.
> 
> Obviously, getting into DDB is crucial here. However, I am not sure if I
> recall an occasion on which the lockup occurred on the console. At the
> moment I can't rule out that there is indeed a panic occurring on the
> console, although I _think_ that the lockups are complete, i.e. no panic.
> 
> Since my uptime is still low, I'll recompile my kernel and throw
> DDB_UNATTENDED out of my kernel config. I'll leave the system on the
> console instead of in X whenever I leave the console and I'll just wait and
> see what happens. 
> 
> At the moment, through crosschecking with others, I've concluded that the
> system hang is either triggered by a specific combination of kernel options
> or by XFree86 version 3.3.6; and of course only on SMP systems. That is,
> unless I'm overlooking something. 
> 
> It'll take me some 5-7 days to get results (i.e. a crash); I'll keep you
> all informed. 
> 
>     Regards,
> 
>     Dave. 
> 
> -- 
>   Dave Boers                                   < djb @ ifa . au . dk >
>   Physics graduate student && unix/BSD sysadmin - University of Twente
>   Public key:  ftp://relativity.student.utwente.nl/pub/pgpkeys/djb.asc  
> 



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