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From: John Baldwin <jhb@freebsd.org>
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Cc: Davide Italiano <davide@freebsd.org>, mlaier@freebsd.org,
	svn-src-projects@freebsd.org, attilio@freebsd.org,
	Konstantin Belousov <kostikbel@gmail.com>,
	src-committers@freebsd.org, Stephan Uphoff <ups@freebsd.org>
Subject: Re: svn commit: r238907 - projects/calloutng/sys/kern
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On Monday, September 17, 2012 3:25:44 am Andre Oppermann wrote:
> Hello Attilio,
> 
> could you integrate and test this patch from Isilon as well:
> 
>    Add INVARIANT and WITNESS support to rm_lock locks and optimize the
>    synchronization path by replacing a LIST of active readers with a
>    TAILQ.
> 
>    Obtained from:	Isilon
>    Submitted by:	mlaier
> 
>    http://svn.freebsd.org/changeset/base/234648
> 
> You're far deeper into locking than I am.

Some of this is already in the tree, and their WITNESS changes don't quite 
work correctly.  I have several fixes (including some of these already) that I 
am just waiting to develop a good test for.  Having an _rm_assert() to pull 
from will be good though.

-- 
John Baldwin