From owner-freebsd-hackers@FreeBSD.ORG  Fri Dec 15 08:38:26 2006
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: 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 D949C16A417
	for <freebsd-hackers@freebsd.org>; Fri, 15 Dec 2006 08:38:26 +0000 (UTC)
	(envelope-from marc.loerner@hob.de)
Received: from mailgate.hob.de (mailgate.hob.de [212.185.199.3])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 6B9C843CF5
	for <freebsd-hackers@freebsd.org>; Fri, 15 Dec 2006 08:36:01 +0000 (GMT)
	(envelope-from marc.loerner@hob.de)
Received: from localhost (localhost.localdomain [127.0.0.1])
	by mailgate.hob.de (Postfix) with ESMTP id DE5EF27757
	for <freebsd-hackers@freebsd.org>; Fri, 15 Dec 2006 09:37:38 +0100 (CET)
Received: from mailgate.hob.de ([127.0.0.1])
	by localhost (mailgate.hob.de [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id 27601-07 for <freebsd-hackers@freebsd.org>;
	Fri, 15 Dec 2006 09:37:38 +0100 (CET)
Received: from imap.hob.de (mail2.hob.de [172.25.1.102])
	by mailgate.hob.de (Postfix) with ESMTP id 4232D2778B
	for <freebsd-hackers@freebsd.org>; Fri, 15 Dec 2006 09:37:38 +0100 (CET)
Received: from linux03.hob.de (linux03.hob.de [172.22.0.190])
	by imap.hob.de (Postfix on SuSE eMail Server 2.0) with ESMTP id
	EEE842FC3
	for <freebsd-hackers@freebsd.org>; Fri, 15 Dec 2006 09:37:37 +0100 (CET)
From: Marc =?iso-8859-1?q?L=F6rner?= <marc.loerner@hob.de>
Organization: hob
To: freebsd-hackers@freebsd.org
Date: Fri, 15 Dec 2006 09:37:37 +0100
User-Agent: KMail/1.6.2
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain;
  charset="us-ascii"
Content-Transfer-Encoding: 7bit
Message-Id: <200612150937.37737.marc.loerner@hob.de>
X-Virus-Scanned: by amavisd-new-20030616-p10 (Debian) at hob.de
Subject: Allocate aligned memory
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: Fri, 15 Dec 2006 08:38:26 -0000

Hello all,

I want to allocate 120KB of memory thats aligned to 32KB.
I already saw/found the function contigmalloc, now my question is, why 
following functioncall never does return with an resulting address, instead 
null is returned?

unsigned long *p = (unsigned long*) 
	contigmalloc(120*1024, M_DEVBUF, M_WAITOK, 0, (1<<22), 32*1024, 1024*1024);

Thanks in advance,
Marc

P.S.: I'm already aware that contigmalloc doesn't support M_WAITOK!