Debugging the scheduler

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Hi all,

We're making some modifications to the scheduler and the kernel
(2.6.35) just crashes without any error whatsoever.  The crash is such
that the kernel responds to pings for a while; but the mouse doesn't
work, screen doesn't refresh and we're not able to ssh as well.  We
tried investigating using kgdb, but kgdb doesn't show any
"exceptions/traps" as well.

We strongly suspect it's some sort of a race condition/deadlock in our
modifications to the scheduler, but we're unable to figure out where
the trouble is.  Do you have any suggestions on how to debug?

Thanks,
-- 
Vimal

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