From owner-cvs-all@FreeBSD.ORG  Mon Dec  5 18:17:11 2005
Return-Path: <owner-cvs-all@FreeBSD.ORG>
X-Original-To: cvs-all@FreeBSD.org
Delivered-To: cvs-all@FreeBSD.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id D3A0516A41F;
	Mon,  5 Dec 2005 18:17:11 +0000 (GMT)
	(envelope-from rwatson@FreeBSD.org)
Received: from cyrus.watson.org (cyrus.watson.org [209.31.154.42])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 64F6443D46;
	Mon,  5 Dec 2005 18:17:11 +0000 (GMT)
	(envelope-from rwatson@FreeBSD.org)
Received: from fledge.watson.org (fledge.watson.org [209.31.154.41])
	by cyrus.watson.org (Postfix) with ESMTP id 1061846B35;
	Mon,  5 Dec 2005 13:17:11 -0500 (EST)
Date: Mon, 5 Dec 2005 18:17:10 +0000 (GMT)
From: Robert Watson <rwatson@FreeBSD.org>
X-X-Sender: robert@fledge.watson.org
To: Mike Silbersack <silby@silby.com>
In-Reply-To: <20051205112600.O43418@odysseus.silby.com>
Message-ID: <20051205181614.V32154@fledge.watson.org>
References: <200511281809.jASI93Rl006494@repoman.freebsd.org>
	<20051204233215.G43418@odysseus.silby.com>
	<20051205094734.P45634@fledge.watson.org>
	<20051205112600.O43418@odysseus.silby.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/kern uipc_socket.c
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 05 Dec 2005 18:17:12 -0000


On Mon, 5 Dec 2005, Mike Silbersack wrote:

> On Mon, 5 Dec 2005, Robert Watson wrote:
>
>> (3) Enhance m_uiotombuf() so that it can either be trivially wrapped by
>>    sosend_copyin(), or replace it.  At the very least, this means adding
>>    zero-copy support to m_uiotombuf(), but I've not looked at this much.
>
> Sounds good, I just wanted to make sure that you were aware of the existence 
> of the two.  Hm, grep just notified me that we have a nfsm_uiotombuf as 
> well, I wonder how different THAT version is.

The NFS server could could probably profitably, and fairly easily, be taught 
how to do zero-copy from the buffer/page cache, btw.  Should be able to steal 
code from sendfile(), although I've not looked in any detail.  Possibly also 
the NFS client.

Robert N M Watson