Commit c4ae0c65 authored by Eric Dumazet's avatar Eric Dumazet Committed by Al Viro

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: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent f2ee7abf
......@@ -1330,6 +1330,7 @@ static void iput_final(struct inode *inode)
}
inode->i_state |= I_FREEING;
if (!list_empty(&inode->i_lru))
inode_lru_list_del(inode);
spin_unlock(&inode->i_lock);
......
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