From: Christoph Hellwig <hch@infradead.org>
To: NeilBrown <neilb@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>,
Mike Snitzer <snitzer@kernel.org>,
Jeff Layton <jlayton@kernel.org>,
Chuck Lever III <chuck.lever@oracle.com>,
Linux NFS Mailing List <linux-nfs@vger.kernel.org>,
Anna Schumaker <anna@kernel.org>,
Trond Myklebust <trondmy@hammerspace.com>,
Dave Chinner <david@fromorbit.com>
Subject: Re: [PATCH v11 00/20] nfs/nfsd: add support for localio
Date: Fri, 5 Jul 2024 23:02:17 -0700 [thread overview]
Message-ID: <Zojd6fVPG5XASErn@infradead.org> (raw)
In-Reply-To: <172021728732.11489.12447081357748108934@noble.neil.brown.name>
On Sat, Jul 06, 2024 at 08:08:07AM +1000, NeilBrown wrote:
> I would like to see a good explanation for why NOT NFSv3.
> I don't think NFSv3 is obsolete. The first dictionary is "No longer in
> use." which certainly doesn't apply.
> I think "deprecated" is a more relevant term. I believe that NFSv2 has
> been deprecated. I believe that NFSv4.0 should be deprecated. But I
> don't see any reason to consider NFSv3 to be deprecated.
The obvious answer is that NFSv4.1/2 (which is really the same thing)
is the only version of NFS under development and open for new features
at the protocol level. So from the standardization perspective NFSv3
is obsolete.
But the more important point is that NFSv4 has a built-in way to bypass
the server for I/O namely pNFS. And bypassing the server by directly
going to a local file system is the text book example for what pNFS
does. So we'll need a really good argument why we need to reinvented
a different scheme for bypassing the server for I/O. Maybe there is
a really good killer argument for doing that, but it needs to be clearly
stated and defended instead of assumed.
next prev parent reply other threads:[~2024-07-06 6:02 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-02 16:28 [PATCH v11 00/20] nfs/nfsd: add support for localio Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 01/20] SUNRPC: add rpcauth_map_to_svc_cred_local Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 02/20] nfs: factor out {encode,decode}_opaque_fixed to nfs_xdr.h Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 03/20] nfs_common: add NFS LOCALIO auxiliary protocol enablement Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 04/20] nfsd: add "localio" support Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 05/20] nfsd: add Kconfig options to allow localio to be enabled Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 06/20] nfsd: manage netns reference in nfsd_open_local_fh Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 07/20] nfsd: use percpu_ref to interlock nfsd_destroy_serv and nfsd_open_local_fh Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 08/20] nfsd: implement server support for NFS_LOCALIO_PROGRAM Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 09/20] SUNRPC: replace program list with program array Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 10/20] nfs: pass nfs_client to nfs_initiate_pgio Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 11/20] nfs: pass descriptor thru nfs_initiate_pgio path Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 12/20] nfs: pass struct file to nfs_init_pgio and nfs_init_commit Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 13/20] nfs: add "localio" support Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 14/20] nfs: fix nfs_localio_vfs_getattr() to properly support v4 Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 15/20] nfs: enable localio for non-pNFS I/O Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 16/20] pnfs/flexfiles: enable localio for flexfiles I/O Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 17/20] SUNRPC: remove call_allocate() BUG_ON if p_arglen=0 to allow RPC with void arg Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 18/20] nfs/localio: use dedicated workqueues for filesystem read and write Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 19/20] nfs: implement client support for NFS_LOCALIO_PROGRAM Mike Snitzer
2024-07-02 16:28 ` [PATCH v11 20/20] nfs: add Documentation/filesystems/nfs/localio.rst Mike Snitzer
2024-07-02 18:06 ` [PATCH v11 00/20] nfs/nfsd: add support for localio Chuck Lever III
2024-07-02 18:32 ` Mike Snitzer
2024-07-02 20:10 ` Chuck Lever III
2024-07-03 0:57 ` Mike Snitzer
2024-07-03 0:52 ` NeilBrown
2024-07-03 1:13 ` Mike Snitzer
2024-07-03 5:04 ` Christoph Hellwig
2024-07-03 8:52 ` Mike Snitzer
2024-07-03 14:16 ` Christoph Hellwig
2024-07-03 15:11 ` Mike Snitzer
2024-07-03 15:18 ` Christoph Hellwig
2024-07-03 15:24 ` Chuck Lever III
2024-07-03 15:29 ` Christoph Hellwig
2024-07-03 15:36 ` Mike Snitzer
2024-07-03 17:06 ` Jeff Layton
2024-07-04 6:00 ` Christoph Hellwig
2024-07-04 18:31 ` Mike Snitzer
2024-07-05 5:18 ` Christoph Hellwig
2024-07-05 13:35 ` Chuck Lever III
2024-07-05 13:39 ` Christoph Hellwig
2024-07-05 14:15 ` Mike Snitzer
2024-07-05 14:18 ` Christoph Hellwig
2024-07-05 14:36 ` Mike Snitzer
2024-07-05 14:59 ` Chuck Lever III
2024-07-06 3:58 ` Mike Snitzer
2024-07-06 5:52 ` NeilBrown
2024-07-06 13:05 ` "why NFSv3?" [was: Re: [PATCH v11 00/20] nfs/nfsd: add support for localio] Mike Snitzer
2024-07-06 5:58 ` [PATCH v11 00/20] nfs/nfsd: add support for localio Christoph Hellwig
2024-07-06 13:12 ` Mike Snitzer
2024-07-08 9:46 ` Christoph Hellwig
2024-07-08 12:55 ` Mike Snitzer
2024-07-06 16:58 ` Chuck Lever III
2024-07-07 0:42 ` Mike Snitzer
2024-07-05 18:59 ` Jeff Layton
2024-07-05 22:08 ` NeilBrown
2024-07-06 6:02 ` Christoph Hellwig [this message]
2024-07-06 6:37 ` NeilBrown
2024-07-06 6:42 ` Christoph Hellwig
2024-07-06 17:15 ` Chuck Lever III
2024-07-08 4:10 ` NeilBrown
2024-07-08 14:41 ` Chuck Lever III
2024-07-08 9:40 ` Christoph Hellwig
2024-07-08 4:03 ` NeilBrown
2024-07-08 9:37 ` Christoph Hellwig
2024-07-10 0:10 ` NeilBrown
2024-07-03 17:19 ` Chuck Lever III
2024-07-03 19:04 ` Mike Snitzer
2024-07-04 5:55 ` Christoph Hellwig
2024-07-03 21:35 ` NeilBrown
2024-07-04 6:01 ` Christoph Hellwig
2024-07-04 10:13 ` Jeff Layton
2024-07-03 15:26 ` Chuck Lever III
2024-07-03 15:37 ` Mike Snitzer
2024-07-03 15:16 ` Christoph Hellwig
2024-07-03 15:28 ` Mike Snitzer
2024-07-04 5:49 ` Christoph Hellwig
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