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From: "C. Jayachandran" <c.jayachandran@gmail.com>
To: Randall Stewart <rrs@lakerest.net>
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Cc: freebsd-mips@freebsd.org
Subject: Re: SMP support for XLR processors.
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On Mon, Apr 19, 2010 at 6:43 PM, Randall Stewart <rrs@lakerest.net> wrote:
> JC I will give it a whirl..
>
> There are other issues though...
>
> I tried with only 16 processors and a LOT of erratic things occur.
>
> I will apply your patch and then I am going to start
> working on being able to bring up only 1 thread on each
> core...
>
> I think some of the problems I am seeing are coming from threads
> getting a bit cross with each other.. but I can't prove that
> unless I can set the mask up
>
> 0x11111111
>
> and right now when I try that we panic :-)

I have a possible cause for the panic with invariants - we should not
schedule the msgring threads unless the smp is completely up. I guess
we start getting message ring interrupts on before the message ring
threads can be scheduled.  I am trying out some changes for this -
will send you a patch if this fixes it.

Thanks,
JC.