On Tue, 2007-10-30 at 21:37 -0700, David Miller wrote:

From: Nick Piggin <redacted>
Date: Wed, 31 Oct 2007 14:26:32 +1100

quoted

Is it really worth all the added complexity of making swap
over NFS files work, given that you could use a network block
device instead?

Don't be misled.  Swapping over NFS is just a scarecrow for the
seemingly real impetus behind these changes which is network storage
stuff like iSCSI.

Not quite, yes, iSCSI is also on the 'want' list of quite a few people,
but swap over NFS on its own is also a feature of great demand.