Re: current kernels hang on i386 and amd64

[Paul Goyette <paul%whooppee.com@localhost>]

On Sat, 24 May 2008, Paul Goyette wrote:

> > I applied the patch ad@ attached to kern/38707 and both machines are
> > running fine now....
>
> The patch for kern/38707 didn't work for me.
>
> I applied the patch, then started a 'build.sh -j8' and about 25 minutes later 
> the machine just locked up solid.  Only recourse was to use the reset button 
> and reboot.

As an additional datapoint, the above-mentioned hang occurred while 
building on a quad-core AMD Phenom with src and obj directories on 
locally-attached disk.

If I NFS-export those file systems and run the exact same build.sh on my 
dual-core Athlon 64 X2 the build takes twice as long as normal but runs 
to completion without errors.

So seems to definitely be related to load.  Either that or I'm getting 
bitten by the "more than 4GB RAM bounce buffer" problem, but the 
symptoms of that are usually less severe - just random failures of gcc 
or other build tool.

Is there an easy way to disable the extra RAM (other than opening up the 
box and removing DIMMs)?


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