From owner-freebsd-hackers@FreeBSD.ORG  Mon Mar 30 01:43:22 2009
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 7B56E1065670;
	Mon, 30 Mar 2009 01:43:22 +0000 (UTC)
	(envelope-from davidxu@freebsd.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 646FC8FC08;
	Mon, 30 Mar 2009 01:43:22 +0000 (UTC)
	(envelope-from davidxu@freebsd.org)
Received: from apple.my.domain (root@localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id n2U1hHRS060570;
	Mon, 30 Mar 2009 01:43:18 GMT (envelope-from davidxu@freebsd.org)
Message-ID: <49D023B7.8070402@freebsd.org>
Date: Mon, 30 Mar 2009 09:43:19 +0800
From: David Xu <davidxu@freebsd.org>
User-Agent: Thunderbird 2.0.0.9 (X11/20080612)
MIME-Version: 1.0
To: Julian Elischer <julian@elischer.org>
References: <11609492.9579.1238167614335.JavaMail.root@vms070.mailsrvcs.net>	<49CD0405.1060704@samsco.org>
	<49CD30E9.7030501@elischer.org> <49CEC261.4010803@freebsd.org>
	<49CF0523.8020905@elischer.org> <49D022EF.8030305@freebsd.org>
In-Reply-To: <49D022EF.8030305@freebsd.org>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Cc: Scott Long <scottl@samsco.org>, Sergey Babkin <babkin@verizon.net>,
	freebsd-hackers@freebsd.org, attilio@freebsd.org,
	phk@phk.freebsd.dk, freebsd-current@freebsd.org, prashant.vaibhav@gmail.com
Subject: Re: Improving the kernel/i386
	timecounter	performance	(GSoC	proposal)
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 30 Mar 2009 01:43:22 -0000

David Xu wrote:
> Julian Elischer wrote:
> 
>> depends on the hardware.
>> anyhow I was only saying it was possible, not necessarily
>> good or even useful.
>>
>>
> 
> I had done some works for thread private page shared by kernel
> and userland when I was doing userland spinlock, if userland asks
> a page, kernel will allocate it and put some interesting thing in
> it by scheduler etcs, these code may be useful.
> 
FYI:
http://people.freebsd.org/~davidxu/schedctl/