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Date: Sat, 15 Feb 2014 15:12:28 -0500
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Subject: Re: panic: stable/10 with Debugging enabled in kern_cons.c:500
From: Benjamin Kaduk <bjkfbsd@gmail.com>
To: Konstantin Belousov <kostikbel@gmail.com>
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On Sat, Jan 11, 2014 at 10:42 PM, Konstantin Belousov
<kostikbel@gmail.com>wrote:

> On Sat, Jan 11, 2014 at 02:44:57PM -0800, Sean Bruno wrote:
> > > panic: mtx_lock_spin: recursed on non-recursive mutex cnputs_mtx
> > > @ /usr/src/sys/kern/kern_cons.c:500
>
> Add
> options         WITNESS_SKIPSPIN
> to the kernel config.  This is required now, unfortunately.
>

I ran into this a few days ago (I had missed Sean's report here) as well.
It seems a poor state to be in; can we mark the cnputs_mtx to not be
checked by WITNESS?  (Or is it a more generic problem with all spin locks
and cnputs is just the first one that is used?)

-Ben