From owner-freebsd-stable@FreeBSD.ORG  Tue Jul  6 06:45:32 2004
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 980C416A4CE; Tue,  6 Jul 2004 06:45:32 +0000 (GMT)
Received: from d162.mplik.ru (relay1.mplik.ru [212.23.64.162])
	by mx1.FreeBSD.org (Postfix) with SMTP
	id 92FD643D58; Tue,  6 Jul 2004 06:45:31 +0000 (GMT)
	(envelope-from ngl@ur.ru)
Received: from d162.mplik.ru (localhost [127.0.0.1])
	by localhost (Postfix) with SMTP
	id 9A63691A3B6; Tue,  6 Jul 2004 12:45:29 +0600 (YEKST)
Received: from spirit (wall.mplik.ru [195.58.1.141])
	by d162.mplik.ru (Postfix) with SMTP
	id A653091A5CB; Tue,  6 Jul 2004 12:45:27 +0600 (YEKST)
Message-ID: <0e6601c46324$d335afe0$8501a8c0@spirit>
From: "ngl" <ngl@ur.ru>
To: "Tim Robbins" <tjr@freebsd.org>
References: <0e0401c46312$089eea10$8501a8c0@spirit>
	<20040706050055.GA63647@cat.robbins.dropbear.id.au>
	<0e3d01c46316$df50c7a0$8501a8c0@spirit>
	<20040706054134.GB63647@cat.robbins.dropbear.id.au>
Date: Tue, 6 Jul 2004 12:45:27 +0600
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.3790.0
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.0
X-Spam-Status: No, tests=bogofilter, spamicity=0.512234, version=0.12.3
X-Sagator-Scanner: 0.4.9-0rc1; drop(clamd()) deliver(BogoFilter())
cc: freebsd-stable@freebsd.org
Subject: Re: Shared/exclusive (rw) locks
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Production branch of FreeBSD source code
	<freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 06 Jul 2004 06:45:32 -0000

That means, freebsd stable has no spin rwlocks ?

Thanks,

Nik
----- Original Message ----- 
From: "Tim Robbins" <tjr@freebsd.org>
To: "ngl" <ngl@ur.ru>
Cc: <freebsd-stable@freebsd.org>
Sent: Tuesday, July 06, 2004 11:41 AM
Subject: Re: Shared/exclusive (rw) locks


> On Tue, Jul 06, 2004 at 11:05:35AM +0600, ngl wrote:
> > Thanks
> > 
> > I've found it too.
> > 
> > But
> > /*
> >  * The general lock structure.  Provides for multiple shared locks,
> >  * upgrading from shared to exclusive, and sleeping until the lock
> >  * can be gained. The simple locks are defined in <machine/param.h>.
> >  */
> > 
> > What means sleeping ? I need spinlock. 
> > I cannot allow to fall asleep to kernel thread.
> 
> You'll need to use simplelocks or spls then, as appropriate to the
> situation.
> 
> 
> Tim
> 
> P.S.: This probably isn't the right mailing list for this discussion.