From owner-freebsd-hackers  Mon Nov  6 10:20:10 2000
Delivered-To: freebsd-hackers@freebsd.org
Received: from zibbi.icomtek.csir.co.za (zibbi.icomtek.csir.co.za [146.64.24.58])
	by hub.freebsd.org (Postfix) with ESMTP
	id B2EF337B4E5; Mon,  6 Nov 2000 10:19:54 -0800 (PST)
Received: (from jhay@localhost)
	by zibbi.icomtek.csir.co.za (8.11.0/8.11.0) id eA6IJNl33880;
	Mon, 6 Nov 2000 20:19:23 +0200 (SAT)
	(envelope-from jhay)
From: John Hay <jhay@icomtek.csir.co.za>
Message-Id: <200011061819.eA6IJNl33880@zibbi.icomtek.csir.co.za>
Subject: Re: dhcp boot was: Re: diskless workstation
In-Reply-To:  <200011051108.aa63419@salmon.maths.tcd.ie> from Ian Dowse at "Nov 5, 2000 11:08:38 am"
To: iedowse@maths.tcd.ie (Ian Dowse)
Date: Mon, 6 Nov 2000 20:19:23 +0200 (SAT)
Cc: ambrisko@whistle.com (Doug Ambrisko),
	jhay@icomtek.csir.co.za (John Hay), msmith@FreeBSD.ORG (Mike Smith),
	danny@cs.huji.ac.il (Danny Braniss), freebsd-hackers@FreeBSD.ORG
X-Mailer: ELM [version 2.4ME+ PL54 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

> In message <200011042037.MAA63521@whistle.com>, Doug Ambrisko writes:
> >| to the kernel's output. I had a look at the pxe code in
> >| /sys/boot/i386/libi386/pxe.c where pxeboot is built from and in
> >| /sys/i386/i386/autoconf.c which is the kernel side and it looks like
> >| they don't do anything about swap. There is a /* XXX set up swap? */
> >| placeholder though. :-)
> >
> >Yep looks like you're right, I just tried it on 4.2-BETA it worked in 
> >4.1.1.  Swap is now broken ... sigh this is going to be a problem.  I 
> >guess the only thing you might be able to do in the interim is to do a 
> >vnconfig of a file and then mount that as swap.  I think the vnconfig 
> >man pages describes this.  Hopefully it works over NFS.
> 
> The diskless setup we use here is based on a compiled-in MFS root
> rather than an NFS root, so we couldn't use the bootp code to enable
> NFS swap.  Our solution was a modification to swapon() to enable
> direct swapping to NFS regular files.
> 
> This results in the same swaponvp() call that the bootp code would
> use (at the time we implemented this, swapping over NFS via vnconfig
> was extremely unreliable; I think things are much better now).

Thanks for the patch. I was able to make a swapfile with vnconfig on
-stable, but on -current I just get a device not configured error.
Your patch work just fine on -current.

John
-- 
John Hay -- John.Hay@icomtek.csir.co.za


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message