On Tue, 2001-11-20 at 07:37, Duncan Sands wrote:
> By the way, I find the preemptible kernel patch
> very helpful for debugging SMP problems on a
> uniprocessor machine.
>
> I'm trying to debug the speedtouch kernel module
> crashes with SMP using it: the module oopses
> nicely with preempt too!
This is a nice unintended benefit of the preemptible kernel patch, eh?
It also helps in your SMP debugging because you can see the lock depth
(how many locks are held) via current->preempt_count. The preempt patch
will also prevent you from infinite looping in the kernel, assuming the
system is able to preempt itself.
Robert Love
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This archive was generated by hypermail 2b29 : Fri Nov 23 2001 - 21:00:23 EST