From owner-freebsd-arm@freebsd.org  Wed Sep 16 02:21:42 2015
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Date: Tue, 15 Sep 2015 19:19:57 -0700
From: bob prohaska <fbsd@www.zefox.net>
To: Warner Losh <imp@bsdimp.com>
Cc: bob prohaska <fbsd@www.zefox.net>, freebsd-arm@freebsd.org
Subject: Re: Reproducible crashes on RPI2 under 11-CURRENT using stress2
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Hi Warner,

On Wed, Sep 02, 2015 at 06:26:45PM -0600, Warner Losh wrote:
> The interrupt controller code is not SMP safe. It needs to be fixed or
> you'll see instability under load. Stuff like these crashes.
> 
> Run a UP kernel if you need to do high loads.
>

Does the interrupt controller change behavior when in single user?
If not the problems may lie elsewhere..

Running an OS build in single user mode on RPI2 (with necessary
services such as swap and powerd turned on) seems to result
in a uniformly successful compilation. So far no smsc0 warnings
and no crashes in about four tries. Times are a bit slow, ~18 hours.

Top reports all four cpu cores active, which suggests that
multiprocessing is also active. Kernel config is default,
with the ULE scheduler.

Thanks for reading, and any insights!

bob prohaska