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Date: Fri, 9 Aug 2013 08:48:29 -0700
From: "David O'Brien" <obrien@FreeBSD.org>
To: Andriy Gapon <avg@FreeBSD.org>
Subject: Re: svn commit: r253996 - in head: .
 sys/cddl/compat/opensolaris/sys sys/cddl/dev/dtrace sys/conf
 sys/modules/cyclic sys/modules/dtrace/dtio sys/modules/dtrace/dtmalloc
 sys/modules/dtrace/dtnfscl sys/m...
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References: <201308061551.r76FpuY7056153@svn.freebsd.org>
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On Tue, Aug 06, 2013 at 03:51:56PM +0000, Andriy Gapon wrote:
> Log:
..
>   Also, meaning of DEBUG was overloaded to enable WITNESS support for some
>   OpenSolaris (primarily ZFS) locks.  Now this overloading is removed and
>   that use of DEBUG is replaced with a new option OPENSOLARIS_WITNESS.

You state there is little value in witness tracking for ZFS in UPDATING.
Is there no reasonable way to gain useful lock tracking for ZFS?

At a minimum, shouldn't this also be added to sys/conf/NOTES in the
"# SMP Debugging Options:" section?

-- 
-- David  (obrien@FreeBSD.org)