From: "Aneesh Kumar K. V" <aneesh.kumar@linux.vnet.ibm.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: miklos@szeredi.hu, miklos@szeredi.hu, hch@infradead.org,
viro@zeniv.linux.org.uk, adilger@sun.com, corbet@lwn.net,
neilb@suse.de, npiggin@kernel.dk, hooanon05@yahoo.co.jp,
bfields@fieldses.org, miklos@szeredi.hu,
linux-fsdevel@vger.kernel.org, sfrench@us.ibm.com,
philippe.deniel@CEA.FR, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -V19 00/15] Generic name to handle and open by handle syscalls
Date: Fri, 17 Sep 2010 23:10:15 +0530 [thread overview]
Message-ID: <m3y6b0s1z4.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <E1Ov26Q-0000Hd-IT@pomaz-ex.szeredi.hu>
On Mon, 13 Sep 2010 08:01:18 +0200, Miklos Szeredi <miklos@szeredi.hu> wrote:
> On Mon, 13 Sep 2010, Aneesh Kumar K. V wrote:
> > d) we can drop stat, chown and xattr syscall because they are introduced
> > specially for symlinks as we don't allow open on symlinks.
> > e) It would be nice to have handle based stat syscall to avoid two
> > syscall overhead for fetching file attributes when implementing a
> > file server, where fetching file attribute is a common operation.
>
> Syscall overhead is generally insignificant compared to other effects.
> The server can also cache open files for commonly used handles.
>
For some client/server file system an open would require communication to
the server where as we can get stat result based on the values
cached on the client if we support handle based stat.
-aneesh
prev parent reply other threads:[~2010-09-17 17:40 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-27 11:02 [PATCH -V19 00/15] Generic name to handle and open by handle syscalls Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 01/15] exportfs: Return the minimum required handle size Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 02/15] vfs: Add name to file handle conversion support Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 03/15] vfs: Add open by file handle support Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 04/15] vfs: Add handle based readlink syscall Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 05/15] vfs: Add handle based stat syscall Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 06/15] vfs: Add handle based link syscall Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 07/15] vfs: Add handle based chown syscall Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 08/15] vfs: Add handle based xattr syscalls Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 09/15] vfs: Add file access and modification time update via handle syscall Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 10/15] x86: Add new syscalls for x86_32 Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 11/15] x86: Add new syscalls for x86_64 Aneesh Kumar K.V
2010-08-27 11:02 ` [PATCH -V19 12/15] unistd.h: Add new syscalls numbers to asm-generic Aneesh Kumar K.V
2010-08-27 11:03 ` [PATCH -V19 13/15] vfs: Export file system uuid via /proc/<pid>/mountinfo Aneesh Kumar K.V
2010-08-27 11:03 ` [PATCH -V19 14/15] ext3: Copy fs UUID to superblock Aneesh Kumar K.V
2010-08-27 11:03 ` [PATCH -V19 15/15] ext4: " Aneesh Kumar K.V
2010-09-07 10:21 ` [PATCH -V19 00/15] Generic name to handle and open by handle syscalls Aneesh Kumar K. V
2010-09-07 11:36 ` Miklos Szeredi
2010-09-07 12:59 ` Aneesh Kumar K. V
2010-09-07 13:24 ` Miklos Szeredi
2010-09-12 19:22 ` Aneesh Kumar K. V
2010-09-13 6:01 ` Miklos Szeredi
2010-09-13 6:59 ` Neil Brown
2010-09-13 7:59 ` Miklos Szeredi
2010-09-17 17:40 ` Aneesh Kumar K. V [this message]
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