From: Christoph Hellwig <hch@infradead.org>
To: "Haynes, Tom" <Tom.Haynes@netapp.com>
Cc: Chuck Lever <chuck.lever@oracle.com>,
Christoph Hellwig <hch@infradead.org>,
"Schumaker, Bryan" <Bryan.Schumaker@netapp.com>,
"J. Bruce Fields" <bfields@fieldses.org>,
Mailing List Linux NFS <linux-nfs@vger.kernel.org>
Subject: Re: [PATCH 3/4] NFSD: Add WRITE_PLUS support for hole punches
Date: Mon, 4 Nov 2013 12:13:20 -0800 [thread overview]
Message-ID: <20131104201320.GA21884@infradead.org> (raw)
In-Reply-To: <1A74FF84-00E2-4C5F-A209-350792D2E0AE@netapp.com>
On Mon, Nov 04, 2013 at 08:03:58PM +0000, Haynes, Tom wrote:
> Do you have an issue with READ_PLUS?
>
> I.e., are you okay with that operation because the answer is not known beforehand?
The hole vs data part of it looks reasonable. The whole ADH complex
looks a little fishy to me, but I will have to dig deeper into before
writing down a detailed critism.
But one very obvious question already comes up: what data is supposed
to be returned when a client that doesn't suport 4.2 at all are doesn't
support ADHs reads a file that contains them. From a quick glance it
seems a mapping from ADHs to flat blocks is possible, but such a mapping
should be specified in the standard.
> There was a strong consensus in the biweekly calls to merge all of the operations together into WRITE_PLUS.
Do you remember any arguments for it? Also any rational for adding the
plain old data write to it?
next prev parent reply other threads:[~2013-11-04 20:13 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-28 14:57 [PATCH 0/4] NFSD: Add support for WRITE_PLUS and SEEK Anna Schumaker
2013-10-28 14:57 ` [PATCH 1/4] NFSD: Update error codes Anna Schumaker
2013-10-28 14:57 ` [PATCH 2/4] NFSD: Create nfs v4.2 decode ops Anna Schumaker
2013-10-28 20:54 ` J. Bruce Fields
2013-10-28 20:59 ` Myklebust, Trond
2013-10-28 21:11 ` J. Bruce Fields
2013-10-29 12:43 ` Anna Schumaker
2013-10-29 13:33 ` J. Bruce Fields
2013-10-28 14:57 ` [PATCH 3/4] NFSD: Add WRITE_PLUS support for hole punches Anna Schumaker
2013-10-28 21:40 ` J. Bruce Fields
2013-10-29 12:49 ` Anna Schumaker
2013-10-29 13:34 ` J. Bruce Fields
2013-10-29 12:50 ` Anna Schumaker
2013-10-29 13:06 ` J. Bruce Fields
2013-10-29 13:11 ` Anna Schumaker
2013-10-29 13:23 ` Myklebust, Trond
2013-10-29 13:28 ` Anna Schumaker
2013-10-29 13:32 ` Dr Fields James Bruce
2013-11-02 13:54 ` Christoph Hellwig
2013-11-02 14:44 ` J. Bruce Fields
2013-11-02 14:51 ` Christoph Hellwig
2013-11-02 15:02 ` Myklebust, Trond
2013-11-02 15:07 ` Christoph Hellwig
2013-11-02 15:20 ` Christoph Hellwig
2013-11-02 13:52 ` Christoph Hellwig
2013-11-04 16:41 ` Anna Schumaker
2013-11-04 17:03 ` Christoph Hellwig
2013-11-04 17:23 ` Anna Schumaker
2013-11-04 18:53 ` Christoph Hellwig
2013-11-04 18:57 ` Anna Schumaker
2013-11-04 19:16 ` Chuck Lever
2013-11-04 19:19 ` Christoph Hellwig
2013-11-04 19:50 ` Chuck Lever
2013-11-04 19:54 ` Christoph Hellwig
2013-11-04 19:55 ` J. Bruce Fields
2013-11-04 20:03 ` Haynes, Tom
2013-11-04 20:13 ` Christoph Hellwig [this message]
2013-11-05 9:40 ` Christoph Hellwig
2013-11-05 14:23 ` Anna Schumaker
2013-11-05 15:11 ` Christoph Hellwig
2013-10-28 14:57 ` [PATCH 4/4] NFSD: Implement SEEK Anna Schumaker
2013-10-28 21:51 ` J. Bruce Fields
2013-10-29 12:53 ` Anna Schumaker
2013-10-29 7:35 ` Christoph Hellwig
2013-10-29 13:00 ` Anna Schumaker
2013-10-29 13:07 ` Christoph Hellwig
2013-10-29 13:30 ` J. Bruce Fields
2013-11-02 13:48 ` Christoph Hellwig
2013-11-02 14:37 ` J. Bruce Fields
2013-11-02 14:41 ` Christoph Hellwig
2013-11-04 16:46 ` J. Bruce Fields
2013-11-04 17:05 ` Christoph Hellwig
2013-11-04 17:22 ` Chuck Lever
2013-11-05 12:33 ` Christoph Hellwig
2013-11-04 21:56 ` Thomas Haynes
2013-11-05 1:03 ` Christoph Hellwig
2013-11-05 2:07 ` Haynes, Tom
2013-11-05 8:23 ` Christoph Hellwig
2013-10-31 16:04 ` Christoph Hellwig
2013-10-31 16:07 ` Anna Schumaker
2013-10-31 16:17 ` Anna Schumaker
2013-10-31 17:13 ` Christoph Hellwig
2013-10-28 14:57 ` [RFC 5/4] NFSD: Add basic CB_OFFLOAD support Anna Schumaker
2013-10-28 21:52 ` J. Bruce Fields
2013-10-29 7:37 ` Christoph Hellwig
2013-10-29 13:36 ` J. Bruce Fields
2013-10-29 13:38 ` Christoph Hellwig
2013-10-29 13:53 ` J. Bruce Fields
2013-10-29 15:11 ` Christoph Hellwig
2013-10-28 20:00 ` [PATCH 0/4] NFSD: Add support for WRITE_PLUS and SEEK Christoph Hellwig
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