From owner-freebsd-questions@freebsd.org  Tue Feb 27 21:25:34 2018
Return-Path: <owner-freebsd-questions@freebsd.org>
Delivered-To: freebsd-questions@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 27216F2A858
 for <freebsd-questions@mailman.ysv.freebsd.org>;
 Tue, 27 Feb 2018 21:25:34 +0000 (UTC)
 (envelope-from 4250.10.freebsd-questions=freebsd.org@email-od.com)
Received: from bca5.email-od.com (bca5.email-od.com [207.246.239.5])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id A94DF71211
 for <freebsd-questions@freebsd.org>; Tue, 27 Feb 2018 21:25:33 +0000 (UTC)
 (envelope-from 4250.10.freebsd-questions=freebsd.org@email-od.com)
DKIM-Signature: v=1; a=rsa-sha256; d=email-od.com;i=@email-od.com;s=dkim;
 c=relaxed/relaxed; q=dns/txt; t=1519766734; x=1522358734;
 h=content-transfer-encoding:content-type:mime-version:references:in-reply-to:message-id:subject:to:from:date:x-thread-info;
 bh=s15QlwrMV3XFgR8TUvdDid7umvS7xtHYyu0imtCXUFU=;
 b=DbAASYGROiR5jtZgFJlEHHqYrPlsgDuX5DStg26m0RNEW+nxSP+uGYSdH1wYqIcBZRDN468sYgdAkVLMyayPQNVYLAPjy9Q0qvQkVr3nwm0Wq5zKc2cVDo38m+9gXJh44IQThPrQ1nKfbQtxTDa/5B227/WKVdasw7NYkn/X9Wc=
X-Thread-Info: NDI1MC4xMi45MjAwMDAwMDQxYmM2Ny5mcmVlYnNkLXF1ZXN0aW9ucz1mcmVlYnNkLm9yZw==
Received: from r4.us-east.aws.in.socketlabs.com
 (r4.us-east.aws.in.socketlabs.com [52.5.202.82]) by bca2.email-od.com
 with ESMTP(version=Tls12 cipher=Aes256 bits=256);
 Tue, 27 Feb 2018 16:25:27 -0500
Received: from smtp.lan.sohara.org (EMTPY [89.127.62.20]) by
 r4.us-east.aws.in.socketlabs.com
 with ESMTP(version=Tls12 cipher=Aes256 bits=256);
 Tue, 27 Feb 2018 16:25:26 -0500
Received: from [192.168.63.1] (helo=steve.lan.sohara.org)
 by smtp.lan.sohara.org with smtp (Exim 4.90 (FreeBSD))
 (envelope-from <steve@sohara.org>) id 1eqmkV-000Hhx-CA
 for freebsd-questions@freebsd.org; Tue, 27 Feb 2018 21:25:23 +0000
Date: Tue, 27 Feb 2018 21:25:23 +0000
From: Steve O'Hara-Smith <steve@sohara.org>
To: freebsd-questions@freebsd.org
Subject: Re: Compiling Swap space
Message-Id: <20180227212523.39096282711b549631aa8924@sohara.org>
In-Reply-To: <alpine.OSX.2.21.1802271414110.45674@ary.qy>
References: <alpine.OSX.2.21.1802271414110.45674@ary.qy>
X-Mailer: Sylpheed 3.6.0 (GTK+ 2.24.31; amd64-portbld-freebsd11.0)
X-Clacks-Overhead: "GNU Terry Pratchett"
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.25
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/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: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 27 Feb 2018 21:25:34 -0000

On 27 Feb 2018 14:16:08 -0500
"John R. Levine" <johnl@iecc.com> wrote:

> > You don't need mdconfig, just make a large file and use swapon like
> > this:
> >
> ># dd if=/dev/zero of=swapfile bs=1m count=1024
> ># swapon swapfile
> 
> Nope.  Try it.  You need a block device.
> 
> # dd if=/dev/zero of=/var/swap bs=1m count=100
> 100+0 records in
> 100+0 records out
> # swapon /var/swap
> swapon: /var/swap: Block device required

	See other post, it works if the file is on an NFS mount, it used to
work anywhere.

-- 
Steve O'Hara-Smith <steve@sohara.org>