Re: current kernels hang on i386 and amd64

[Michael Lorenz <macallan%netbsd.org@localhost>]

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Hello,

On May 22, 2008, at 15:52, Kurt Schreiner wrote:

> kernels compiled from -current source cvs updated May 22 20:18 MEST
> hang under heavy load. The i386 machine is a P4 2.8GHz, HT enabled
> w/ 2GB Ram and hangs after working some minutes on "build.sh -j8 ...
> release". "Hang" means no answer to ping, no drop to ddb, no answer
> to (PS/2-)keyboard only reset or power button helps.
> The amd64 machine is a Q6600 w/ 8GB Ram and hangs after working
> some minutes on "build.sh -j31 ... release". "Hang" is the same
> as above. I've seen no problems w/ lighter loads (-j2 resp. -j12).
> Last working kernels on both machines are from May 16...

Sounds like the same scheduler deadlock I'm seeing on macppc - please  
try a kernel with options LOCKDEBUG, if it panics with 'locking  
against myself' on a spinlock in sched_nextlwp() it's the same problem.
There's a PR about it - kern/38707

have fun
Michael

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