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From: John Baldwin <jhb@freebsd.org>
To: Bryan Drewery <bdrewery@freebsd.org>
Subject: Re: svn commit: r272032 - head/sys/conf
Date: Wed, 24 Sep 2014 09:38:37 -0400
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On Tuesday, September 23, 2014 05:04:21 PM Bryan Drewery wrote:
> Author: bdrewery
> Date: Tue Sep 23 17:04:21 2014
> New Revision: 272032
> URL: http://svnweb.freebsd.org/changeset/base/272032
> 
> Log:
>   DEBUG_LOCKS no longer modifies 'struct vnode', nor does fstat(1) use it.
>   fstat(1) now uses libprocstat(9).  There is no userland impact to using
> this.

As your followup noted, it does change the size of 'struct lock' (and thus
'struct vnode') still.  While fstat does not use it for live, it probably
still uses it for coredumps.  However, lsof uses kvm access, so it will break.
I don't think that is worth noting here, but more of an FYI.

-- 
John Baldwin