From owner-svn-src-all@FreeBSD.ORG  Sun Mar 29 08:07:05 2015
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 811BCE4A;
 Sun, 29 Mar 2015 08:07:05 +0000 (UTC)
Received: from zxy.spb.ru (zxy.spb.ru [195.70.199.98])
 (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 326E7EBB;
 Sun, 29 Mar 2015 08:07:05 +0000 (UTC)
Received: from slw by zxy.spb.ru with local (Exim 4.84 (FreeBSD))
 (envelope-from <slw@zxy.spb.ru>)
 id 1Yc8FI-0008Zf-Lt; Sun, 29 Mar 2015 11:07:00 +0300
Date: Sun, 29 Mar 2015 11:07:00 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Benjamin Kaduk <bjkfbsd@gmail.com>
Subject: Re: svn commit: r280759 - head/sys/netinet
Message-ID: <20150329080700.GM23643@zxy.spb.ru>
References: <201503271326.t2RDQxd3056112@svn.freebsd.org>
 <20150328083443.GV64665@FreeBSD.org>
 <20150328172313.GC51048@funkthat.com>
 <20150328181833.GX64665@FreeBSD.org>
 <20150328204333.GF51048@funkthat.com>
 <20150328213403.GB74532@zxy.spb.ru>
 <20150329011534.GH51048@funkthat.com>
 <CAJ5_RoBKOA5JFnxupzSKpcA8Mf-H0Ep7mrJEboQ97w-9_AUJ+g@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAJ5_RoBKOA5JFnxupzSKpcA8Mf-H0Ep7mrJEboQ97w-9_AUJ+g@mail.gmail.com>
User-Agent: Mutt/1.5.23 (2014-03-12)
X-SA-Exim-Connect-IP: <locally generated>
X-SA-Exim-Mail-From: slw@zxy.spb.ru
X-SA-Exim-Scanned: No (on zxy.spb.ru); SAEximRunCond expanded to false
Cc: "src-committers@freebsd.org" <src-committers@freebsd.org>,
 John-Mark Gurney <jmg@funkthat.com>, Fabien Thomas <fabient@freebsd.org>,
 Gleb Smirnoff <glebius@freebsd.org>,
 "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>,
 "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
 user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all/>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 29 Mar 2015 08:07:05 -0000

On Sat, Mar 28, 2015 at 11:22:16PM -0400, Benjamin Kaduk wrote:

> On Sat, Mar 28, 2015 at 9:15 PM, John-Mark Gurney <jmg@funkthat.com> wrote:
> 
> > Slawa Olhovchenkov wrote this message on Sun, Mar 29, 2015 at 00:34 +0300:
> > > On Sat, Mar 28, 2015 at 01:43:33PM -0700, John-Mark Gurney wrote:
> > >
> > > In this case may be do range allocation of ID (per-CPU)?
> > > For example, allocate 128 ID, not one ID?
> >
> > Do you mean what to do in the case of an atomic packet?
> >
> > Per RFC:
> >    In atomic datagrams, the IPv4 ID field has no meaning; thus, it can
> >    be set to an arbitrary value, i.e., the requirement for non-repeating
> >    IDs within the source address/destination address/protocol tuple is
> >    no longer required for atomic datagrams:
> >
> > You can just set it to 0, or any value we feel like.
> >
> 
> My reading was to give each CPU its own range from which to allocate IDs,
> to guarantee that there are no collisions between CPUs.

Yes.