From: "J. Bruce Fields" <bfields@fieldses.org>
To: "Aneesh Kumar K. V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Neil Brown <neilb@suse.de>,
hch@infradead.org, viro@zeniv.linux.org.uk, adilger@sun.com,
corbet@lwn.net, serue@us.ibm.com, hooanon05@yahoo.co.jp,
linux-fsdevel@vger.kernel.org, sfrench@us.ibm.com,
philippe.deniel@CEA.FR, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -V14 0/11] Generic name to handle and open by handle syscalls
Date: Tue, 6 Jul 2010 12:10:02 -0400 [thread overview]
Message-ID: <20100706161002.GD7387@fieldses.org> (raw)
In-Reply-To: <87iq4y29a6.fsf@linux.vnet.ibm.com>
On Fri, Jul 02, 2010 at 02:45:45AM +0530, Aneesh Kumar K. V wrote:
> One use case i had was that if the userspace file server can directly
> work with the returned file system UUID,
I agree that the uuid should be split out from the rest of the
filehandle, but ...
> the it can build the file
> handle for client in a single call.
... I don't understand why both need to come in the same system call.
Is it purely an efficiency question? If so, why do you expect this to
be significant?
(I would have thought that the system call overhead is so small, and so
many calls will already be required to perform the typical rpc, that
this would be insignificant.)
A filesystem uuid seems like a generally useful thing (maybe more so
than a filehandle), so it'd seem worth figuring out how to export that
separately.
--b.
next prev parent reply other threads:[~2010-07-06 16:10 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-15 17:12 [PATCH -V14 0/11] Generic name to handle and open by handle syscalls Aneesh Kumar K.V
2010-06-15 17:12 ` [PATCH -V14 01/11] exportfs: Return the minimum required handle size Aneesh Kumar K.V
2010-06-15 17:12 ` [PATCH -V14 02/11] vfs: Add name to file handle conversion support Aneesh Kumar K.V
2010-06-15 17:12 ` [PATCH -V14 03/11] vfs: Add open by file handle support Aneesh Kumar K.V
2010-07-07 15:17 ` Nick Piggin
2010-07-07 16:16 ` Aneesh Kumar K. V
2010-06-15 17:12 ` [PATCH -V14 04/11] vfs: Allow handle based open on symlinks Aneesh Kumar K.V
2010-07-07 15:23 ` Nick Piggin
2010-07-07 16:24 ` Aneesh Kumar K. V
2010-07-07 16:57 ` Nick Piggin
2010-07-07 17:53 ` Aneesh Kumar K. V
2010-07-07 18:20 ` Nick Piggin
2010-07-07 16:48 ` Nick Piggin
2010-07-08 10:42 ` Aneesh Kumar K. V
2010-06-15 17:12 ` [PATCH -V14 05/11] vfs: Support null pathname in readlink Aneesh Kumar K.V
2010-07-07 15:27 ` Nick Piggin
2010-07-07 16:32 ` Aneesh Kumar K. V
2010-07-07 17:03 ` Nick Piggin
2010-06-15 17:12 ` [PATCH -V14 06/11] ext4: Copy fs UUID to superblock Aneesh Kumar K.V
2010-06-15 17:12 ` [PATCH -V14 07/11] x86: Add new syscalls for x86_32 Aneesh Kumar K.V
2010-06-15 17:12 ` [PATCH -V14 08/11] x86: Add new syscalls for x86_64 Aneesh Kumar K.V
2010-06-15 17:12 ` [PATCH -V14 09/11] ext3: Copy fs UUID to superblock Aneesh Kumar K.V
2010-06-15 17:13 ` [PATCH -V14 10/11] vfs: Support null pathname in faccessat Aneesh Kumar K.V
2010-06-15 17:13 ` [PATCH -V14 11/11] vfs: Support null pathname in linkat Aneesh Kumar K.V
2010-07-01 16:28 ` [PATCH -V14 0/11] Generic name to handle and open by handle syscalls Aneesh Kumar K. V
2010-07-01 20:41 ` Neil Brown
2010-07-01 21:15 ` Aneesh Kumar K. V
2010-07-06 16:10 ` J. Bruce Fields [this message]
2010-07-06 17:09 ` Aneesh Kumar K. V
2010-07-06 23:23 ` Dave Chinner
2010-07-06 23:36 ` Neil Brown
2010-07-07 2:11 ` Dave Chinner
2010-07-07 2:57 ` Neil Brown
2010-07-07 12:44 ` Miklos Szeredi
2010-07-07 12:57 ` J. Bruce Fields
2010-07-07 13:10 ` Miklos Szeredi
2010-07-07 13:17 ` J. Bruce Fields
2010-07-07 13:35 ` Miklos Szeredi
2010-07-07 14:45 ` J. Bruce Fields
2010-07-07 16:33 ` Aneesh Kumar K. V
2010-07-07 16:39 ` J. Bruce Fields
2010-07-07 22:21 ` Neil Brown
2010-07-07 22:25 ` J. Bruce Fields
2010-07-08 0:03 ` Andreas Dilger
2010-07-08 5:03 ` Neil Brown
2010-07-08 10:40 ` Aneesh Kumar K. V
2010-07-08 11:52 ` Miklos Szeredi
2010-07-08 12:21 ` Neil Brown
2010-07-09 18:42 ` Andreas Dilger
2010-07-10 4:58 ` Aneesh Kumar K. V
2010-07-07 7:40 ` Andreas Dilger
2010-07-07 15:05 ` J. Bruce Fields
2010-07-07 17:02 ` Andreas Dilger
2010-07-07 17:37 ` J. Bruce Fields
2010-07-07 18:05 ` Nick Piggin
2010-07-07 23:49 ` Andreas Dilger
2010-07-07 18:18 ` Aneesh Kumar K. V
2010-07-07 20:39 ` Alan Cox
2010-07-07 23:54 ` Andreas Dilger
2010-07-02 4:02 ` Andreas Dilger
2010-07-02 7:05 ` hch
2010-07-02 16:12 ` Andreas Dilger
2010-07-02 22:09 ` Neil Brown
2010-07-02 22:47 ` Andreas Dilger
2010-07-03 16:04 ` Aneesh Kumar K. V
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