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Date: Mon, 31 Mar 2008 09:18:02 +0100 (BST)
From: Robert Watson <rwatson@FreeBSD.org>
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To: David Xu <davidxu@FreeBSD.org>
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Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/lib/libthr/thread thr_cond.c thr_private.h 
 thr_rwlock.c
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On Mon, 31 Mar 2008, David Xu wrote:

> davidxu     2008-03-31 02:55:50 UTC
>
>  FreeBSD src repository
>
>  Modified files:
>    lib/libthr/thread    thr_cond.c thr_private.h thr_rwlock.c
>  Log:
>  Rewrite rwlock to user atomic operations to change rwlock state, this
>  eliminates internal mutex lock contention when most rwlock operations
>  are read.
>
>  Orignal patch provided by: jeff

Do you have MFC plans for this change?  It would be great to see this hit 
RELENG_7 before 7.1, assuming it settles out well.

Robert N M Watson
Computer Laboratory
University of Cambridge