From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 26 Jul 2011 09:36:34 +0000 (+0200)
Subject: vfs: dont chain pipe/anon/socket on superblock s_inodes list
X-Git-Tag: v3.1-rc1~147^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a209dfc7b0d94bd6fa94553c097836a2e6d0f0ba;p=pandora-kernel.git

vfs: dont chain pipe/anon/socket on superblock s_inodes list

Workloads using pipes and sockets hit inode_sb_list_lock contention.

superblock s_inodes list is needed for quota, dirty, pagecache and
fsnotify management. pipe/anon/socket fs are clearly not candidates for
these.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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