netdev - [PATCH 6/6] fs: Introduce kern_mount_special() to mount special vfs

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Message-ID: <492DDCAB.1070204@cosmosbay.com>
Date:	Thu, 27 Nov 2008 00:32:59 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	David Miller <davem@...emloft.net>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org,
	kernel-testers@...r.kernel.org, Mike Galbraith <efault@....de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>
Subject: [PATCH 6/6] fs: Introduce kern_mount_special() to mount special vfs

This function arms a flag (MNT_SPECIAL) on the vfs, to avoid
refcounting on permanent system vfs.
Use this function for sockets, pipes, anonymous fds.

(socket8 bench result : from 2.94s to 2.23s)

Signed-off-by: Eric Dumazet <dada1@...mosbay.com>
---
 fs/anon_inodes.c      |    2 +-
 fs/pipe.c             |    2 +-
 fs/super.c            |    9 +++++++++
 include/linux/fs.h    |    1 +
 include/linux/mount.h |    5 +++--
 net/socket.c          |    2 +-
 6 files changed, 16 insertions(+), 5 deletions(-)


View attachment "mnt_special.patch" of type "text/plain" (3353 bytes)