From owner-freebsd-hackers@FreeBSD.ORG  Wed Dec  5 16:55:41 2012
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
 by hub.freebsd.org (Postfix) with ESMTP id 8A324D2B;
 Wed,  5 Dec 2012 16:55:41 +0000 (UTC) (envelope-from jhb@freebsd.org)
Received: from bigwig.baldwin.cx (bigknife-pt.tunnel.tserv9.chi1.ipv6.he.net
 [IPv6:2001:470:1f10:75::2])
 by mx1.freebsd.org (Postfix) with ESMTP id 582828FC19;
 Wed,  5 Dec 2012 16:55:41 +0000 (UTC)
Received: from pakbsde14.localnet (unknown [38.105.238.108])
 by bigwig.baldwin.cx (Postfix) with ESMTPSA id 91F22B982;
 Wed,  5 Dec 2012 11:55:40 -0500 (EST)
From: John Baldwin <jhb@freebsd.org>
To: Ryan Stone <rysto32@gmail.com>
Subject: Re: kernel module parallel build?
Date: Wed, 5 Dec 2012 11:42:17 -0500
User-Agent: KMail/1.13.5 (FreeBSD/8.2-CBSD-20110714-p22; KDE/4.5.5; amd64; ; )
References: <5083D84E.50903@freebsd.org> <201212041052.51476.jhb@freebsd.org>
 <CAFMmRNzmfHcC3S+Ffh2YjWDdzr=ddHEggrg+iyjjfc6COKdKSw@mail.gmail.com>
In-Reply-To: <CAFMmRNzmfHcC3S+Ffh2YjWDdzr=ddHEggrg+iyjjfc6COKdKSw@mail.gmail.com>
MIME-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-15"
Content-Transfer-Encoding: 7bit
Message-Id: <201212051142.18361.jhb@freebsd.org>
X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7
 (bigwig.baldwin.cx); Wed, 05 Dec 2012 11:55:40 -0500 (EST)
Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>,
 FreeBSD Current <freebsd-current@freebsd.org>,
 Andre Oppermann <andre@freebsd.org>
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
 <freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/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: Wed, 05 Dec 2012 16:55:41 -0000

On Tuesday, December 04, 2012 2:41:32 pm Ryan Stone wrote:
> On Tue, Dec 4, 2012 at 10:52 AM, John Baldwin <jhb@freebsd.org> wrote:
> 
> > Hmm, I certainly see the module directories being built in parallel.  Some
> > of
> > the make jobs may not be as obvious since links are silent (no output
> > unless
> > there is an error).
> >
> >
> This is definitely not the behaviour that I see trying to build any version
> of FreeBSD.  I see the same behaviour as Andre: the depend and all targets
> both iterate through the module directories sequentially.  It never builds
> two module subdirectories concurrently.

Hmm, I think I was confused by seeing kernel builds intermingle with the 
associated modules.  sys/modules/Makefile uses bsd.subdir.mk.  I think I see 
similar things in world builds where I will see parallel builds of bin vs sbin 
vs usr.bin vs usr.sbin, but within each of those directories the builds go 
sequentially.  I think you would need to change bsd.subdir.mk if you want to 
fix this.

-- 
John Baldwin