From owner-svn-src-head@freebsd.org  Tue Jan 19 19:35:56 2016
Return-Path: <owner-svn-src-head@freebsd.org>
Delivered-To: svn-src-head@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8C166A89FEB;
 Tue, 19 Jan 2016 19:35:56 +0000 (UTC) (envelope-from hps@selasky.org)
Received: from mail.turbocat.net (heidi.turbocat.net [88.198.202.214])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 525151E09;
 Tue, 19 Jan 2016 19:35:55 +0000 (UTC) (envelope-from hps@selasky.org)
Received: from laptop015.home.selasky.org (unknown [62.141.129.119])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (No client certificate requested)
 by mail.turbocat.net (Postfix) with ESMTPSA id C29631FE024;
 Tue, 19 Jan 2016 20:35:46 +0100 (CET)
Subject: Re: svn commit: r294327 - in head/sys: dev/cxgb dev/cxgbe dev/e1000
 dev/hyperv/netvsc dev/ixgbe dev/mxge netinet sys
To: Adrian Chadd <adrian.chadd@gmail.com>, Ryan Stone <rysto32@gmail.com>
References: <201601191533.u0JFXSxf037804@repo.freebsd.org>
 <CAFMmRNz3uXim3H3-sGuBUBs45Jy8p260ywothgp4iFkUcnvnEw@mail.gmail.com>
 <569E6A38.8080108@selasky.org>
 <CAFMmRNx3zC=mz=TC2Aq5==a5vh0Fqzv1domrCL2uUHnjybZSkQ@mail.gmail.com>
 <CAJ-Vmoki0yCU-mmPGfrGyJ_ar_=KKkto_ioomo_Ri_HCWR70cg@mail.gmail.com>
Cc: "src-committers@freebsd.org" <src-committers@freebsd.org>,
 "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>,
 "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>
From: Hans Petter Selasky <hps@selasky.org>
Message-ID: <569E909B.60506@selasky.org>
Date: Tue, 19 Jan 2016 20:38:03 +0100
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101
 Thunderbird/38.4.0
MIME-Version: 1.0
In-Reply-To: <CAJ-Vmoki0yCU-mmPGfrGyJ_ar_=KKkto_ioomo_Ri_HCWR70cg@mail.gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
 <svn-src-head.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head/>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 19 Jan 2016 19:35:56 -0000

On 01/19/16 20:26, Adrian Chadd wrote:
> Well, why are you using qsort to do it, rather than walking the list
> of streams and inputting all the mbufs per stream?
>
> That's an O(1) operation.
>

Because you don't know when the stream ends and then you'll need to pass 
the list one time for every stream which is O(N*N) :-)

--HPS