Eric Dumazet c4ae0c6545 vfs: avoid call to inode_lru_list_del() if possible ...

inode_lru_list_del() is expensive because of per superblock lru locking,
while some inodes are not in lru list.

Adding a check in iput_final() can speedup pipe/sockets workloads on
SMP.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2011-08-01 01:41:17 -04:00

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