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(parent: 5a30d8a) | patch
vfs: conditionally call inode_wb_list_del()
authorEric Dumazet <eric.dumazet@gmail.com>
Thu, 28 Jul 2011 04:11:47 +0000 (06:11 +0200)
committerAl Viro <viro@zeniv.linux.org.uk>
Mon, 1 Aug 2011 05:41:17 +0000 (01:41 -0400)
commitb12362bdb61a230a67daa77bcd2a11e59b2802e1
treef85752d085d3618207ef6aa5b7d8a10910201fc5tree | snapshot (tar.gz zip)
parent5a30d8a2b8ddd5102c440c7e5a7c8e1fd729c818commit | diff
vfs: conditionally call inode_wb_list_del()

Some inodes (pipes, sockets, ...) are not in bdi writeback list.

evict() can avoid calling inode_wb_list_del() and its expensive spinlock
by checking inode i_wb_list being empty or not.

At this point, no other cpu/user can concurrently manipulate this inode
i_wb_list

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/inode.c diff | blob | blame | history