From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: [PATCH 00/29] Swap over NFS -v15 Date: Thu, 20 Dec 2007 09:00:04 +0100 Message-ID: <1198137604.6484.25.camel@twins> References: <20071214153907.770251000@chello.nl> <476999B7.1000203@tmr.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-6SMKnQn+0+PVsF307nk1" Cc: Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, trond.myklebust@fys.uio.no To: Bill Davidsen Return-path: Received: from viefep18-int.chello.at ([213.46.255.22]:51886 "EHLO viefep11-int.chello.at" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750960AbXLTIAJ (ORCPT ); Thu, 20 Dec 2007 03:00:09 -0500 In-Reply-To: <476999B7.1000203@tmr.com> Sender: netdev-owner@vger.kernel.org List-ID: --=-6SMKnQn+0+PVsF307nk1 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Wed, 2007-12-19 at 17:22 -0500, Bill Davidsen wrote: > Peter Zijlstra wrote: > > Hi, > >=20 > > Another posting of the full swap over NFS series.=20 > >=20 > > Andrew/Linus, could we start thinking of sticking this in -mm? > >=20 >=20 > Two questions: > 1 - what is the memory use impact on the system which don't do swap over=20 > NFS, such as embedded systems, and It should have little to no impact if not used. > 2 - what is the advantage of this code over the two existing network=20 > swap approaches,=20 > swapping to NFS mounted file and=20 This is not actually possible with a recent kernel, current swapfile support requires a blockdevice. > swap to NBD device? > I've used the NFS file when a program was running out of memory and that=20 > seemed to work, people in UNYUUG have reported that the nbd swap works,=20 > so what's better here? swap over NBD works sometimes, its rather easy to deadlock, and its impossible to recover from a broken connection. --=-6SMKnQn+0+PVsF307nk1 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBHaiEEXA2jU0ANEf4RAl93AJ97JZvV0QnnGe1G9cyi4ENjZnyBtgCbBeHc BHq+vfwezh/scL/6LPg9c90= =VCif -----END PGP SIGNATURE----- --=-6SMKnQn+0+PVsF307nk1--