From owner-freebsd-questions@FreeBSD.ORG  Sat Apr 12 18:55:03 2008
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 5E736106566C
	for <freebsd-questions@freebsd.org>;
	Sat, 12 Apr 2008 18:55:03 +0000 (UTC)
	(envelope-from keramida@ceid.upatras.gr)
Received: from igloo.linux.gr (igloo.linux.gr [62.1.205.36])
	by mx1.freebsd.org (Postfix) with ESMTP id 994E68FC18
	for <freebsd-questions@freebsd.org>;
	Sat, 12 Apr 2008 18:55:02 +0000 (UTC)
	(envelope-from keramida@ceid.upatras.gr)
Received: from kobe.laptop (adsl44-27.kln.forthnet.gr [77.49.171.27])
	(authenticated bits=128)
	by igloo.linux.gr (8.14.2/8.14.2/Debian-3) with ESMTP id m3CIsjxb031591
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT);
	Sat, 12 Apr 2008 21:54:52 +0300
Received: from kobe.laptop (kobe.laptop [127.0.0.1])
	by kobe.laptop (8.14.2/8.14.2) with ESMTP id m3CIshBS002480;
	Sat, 12 Apr 2008 21:54:43 +0300 (EEST)
	(envelope-from keramida@ceid.upatras.gr)
Received: (from keramida@localhost)
	by kobe.laptop (8.14.2/8.14.2/Submit) id m3CIseeP002479;
	Sat, 12 Apr 2008 21:54:40 +0300 (EEST)
	(envelope-from keramida@ceid.upatras.gr)
From: Giorgos Keramidas <keramida@ceid.upatras.gr>
To: freebsd@sopwith.solgatos.com
References: <200804121515.PAA01187@sopwith.solgatos.com>
Date: Sat, 12 Apr 2008 21:54:40 +0300
In-Reply-To: <200804121515.PAA01187@sopwith.solgatos.com> (Dieter's message of
	"Sat, 12 Apr 2008 08:15:41 +0100")
Message-ID: <87ej9aaopb.fsf@kobe.laptop>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (berkeley-unix)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-MailScanner-ID: m3CIsjxb031591
X-Hellug-MailScanner: Found to be clean
X-Hellug-MailScanner-SpamCheck: not spam, SpamAssassin (not cached,
	score=-3.911, required 5, autolearn=not spam, ALL_TRUSTED -1.80,
	AWL 0.49, BAYES_00 -2.60)
X-Hellug-MailScanner-From: keramida@ceid.upatras.gr
X-Spam-Status: No
Cc: freebsd-questions@freebsd.org
Subject: Re: 6.2 -> 7.0 now mlock(2) fails
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 12 Apr 2008 18:55:03 -0000

On Sat, 12 Apr 2008 08:15:41 +0100,
Dieter <freebsd@sopwith.solgatos.com> wrote:
> I never saw mlock(2) fail in 6.2 but with 7.0 I sometimes
> get mlock(2) failed: Resource temporarily unavailable.

That's error EAGAIN:

     [EAGAIN]           Locking the indicated range would exceed
                        either the system or per-process limit
                        for locked memory.

You are hitting either the `vm.max_wired' limit, or the per-process
RLIMIT_MEMLOCK limit.

> What changed and how do I fix it?

It would be nice if you could run a test program that prints the value of
vm.max_wired and RLIMIT_MEMLOCK on 6.2 and then on 7.0.  As an extra test,
it may be worth printing these values in the log of your application when
mlock(2) fails.