From: "hch@infradead.org" <hch@infradead.org>
To: Andreas Dilger <andreas.dilger@oracle.com>
Cc: Neil Brown <neilb@suse.de>,
"Aneesh Kumar K. V" <aneesh.kumar@linux.vnet.ibm.com>,
"hch@infradead.org" <hch@infradead.org>,
"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
"adilger@sun.com" <adilger@sun.com>,
"corbet@lwn.net" <corbet@lwn.net>,
"serue@us.ibm.com" <serue@us.ibm.com>,
"hooanon05@yahoo.co.jp" <hooanon05@yahoo.co.jp>,
"bfields@fieldses.org" <bfields@fieldses.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"sfrench@us.ibm.com" <sfrench@us.ibm.com>,
"philippe.deniel@CEA.FR" <philippe.deniel@CEA.FR>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -V14 0/11] Generic name to handle and open by handle syscalls
Date: Fri, 2 Jul 2010 03:05:48 -0400 [thread overview]
Message-ID: <20100702070548.GA6959@infradead.org> (raw)
In-Reply-To: <A44260DA-245D-47DD-820E-2F4F1F50BB9D@oracle.com>
On Thu, Jul 01, 2010 at 10:02:29PM -0600, Andreas Dilger wrote:
> I'd like to be able to use this interface to implement the distributed open call proposed by the POSIX HECWG. This allows one client to do the path traversal, broadcast the file handle to the (maybe) 1M processes in the job via MPI, and then the other clients can open the file by handle without doing 1M times the full path traversal (which might be 10's of RPCs per process).
The proposal is doomed anyway. If we allow any sort of open by handle
system call for unprivilegued users we need to do reconnect the dentry
to the dcache path anyway (reconnect_path), which is more expensive than
a normal path lookup.
next prev parent reply other threads:[~2010-07-02 7:05 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
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 [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100702070548.GA6959@infradead.org \
--to=hch@infradead.org \
--cc=adilger@sun.com \
--cc=andreas.dilger@oracle.com \
--cc=aneesh.kumar@linux.vnet.ibm.com \
--cc=bfields@fieldses.org \
--cc=corbet@lwn.net \
--cc=hooanon05@yahoo.co.jp \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=neilb@suse.de \
--cc=philippe.deniel@CEA.FR \
--cc=serue@us.ibm.com \
--cc=sfrench@us.ibm.com \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).