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Date: Sat, 16 Aug 2003 18:12:36 +1000
From: Peter Jeremy <PeterJeremy@optushome.com.au>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
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References: <20030816010942.GC8274@wantadilla.lemis.com>
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cc: Greg 'groggy' Lehey <grog@freebsd.org>
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Subject: Re: cvs commit: src/sys/nfsclient bootp_subr.c nfs_diskless.c
	nfs_vfsops.c nfsdiskless.h
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On Sat, Aug 16, 2003 at 09:10:01AM +0200, Poul-Henning Kamp wrote:
>In message <20030816010942.GC8274@wantadilla.lemis.com>, "Greg 'groggy' Lehey" 
>writes:
>>>   Suggested replacement command sequence on the client:
>>>
>>>           dd if=/dev/zero of=/swapfile bs=1k count=1 oseek=100000
>>>           swapon /swapfile
>>>           rm -f /swapfile
>>>
>>>   For whatever value of 100000 you want.
>>
>>I'm confused.  Why was this necessary?  Which is the "magic" way?  Is
>>the rm -f /swapfile really necessary, or just a foot guard?
...
>Removing the swapfile is means that the file dies on the server and
>that nobody can write trash in it.

Not if / is NFS mounted:  Removing the file on the client just renames
it to a .nfsXXXXXXXX name.  It retains the original permissions and
is still on both the client and server under this dummy name.

Peter