From owner-freebsd-hackers@FreeBSD.ORG  Mon Jul 21 12:53:37 2003
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 7237937B41A
	for <freebsd-hackers@freebsd.org>;
	Mon, 21 Jul 2003 12:53:37 -0700 (PDT)
Received: from hysteria.spc.org (hysteria.spc.org [195.206.69.234])
	by mx1.FreeBSD.org (Postfix) with SMTP id 3E3F543F85
	for <freebsd-hackers@freebsd.org>;
	Mon, 21 Jul 2003 12:53:36 -0700 (PDT)
	(envelope-from bms@hysteria.spc.org)
Received: (qmail 16492 invoked by uid 5013); 21 Jul 2003 19:51:19 -0000
Date: Mon, 21 Jul 2003 20:51:19 +0100
From: Bruce M Simpson <bms@spc.org>
To: Pawel Jakub Dawidek <nick@garage.freebsd.pl>
Message-ID: <20030721195119.GG22295@spc.org>
Mail-Followup-To: Bruce M Simpson <bms@spc.org>,
	Pawel Jakub Dawidek <nick@garage.freebsd.pl>,
	Matthew Dillon <dillon@apollo.backplane.com>,
	freebsd-hackers@freebsd.org
References: <20030720235759.GJ437@garage.freebsd.pl>
	<20030721181805.GA43543@garage.freebsd.pl>
	<200307211903.h6LJ3xrX027536@apollo.backplane.com>
	<20030721191622.GC43543@garage.freebsd.pl>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20030721191622.GC43543@garage.freebsd.pl>
User-Agent: Mutt/1.4.1i
cc: freebsd-hackers@freebsd.org
cc: Matthew Dillon <dillon@apollo.backplane.com>
Subject: Re: VM problem...
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
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: Mon, 21 Jul 2003 19:53:37 -0000

Hi Pawel,

On Mon, Jul 21, 2003 at 09:16:22PM +0200, Pawel Jakub Dawidek wrote:
> I'm allocationg memory with obreak() function (so vm_map_find() function
> is used to find space). But if I try to allocate size (and size is small),
> obreak() will allocate more memory.

You may find the vm_map and pmap documentation which I have just
submitted to the project helpful for reference:-

http://www.freebsd.org/cgi/query-pr.cgi?pr=docs/54691
http://www.freebsd.org/cgi/query-pr.cgi?pr=docs/54632

and ref: our online conversation about the vm_map_insert() semantics
(and possible failure mode re: NULL vm_object argument for the user
process case).

Regards,
BMS