diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-07-28 06:41:09 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-08-01 01:41:17 -0400 |
| commit | f2ee7abf4c40c8e6bffced923a7c01ea2d1f6c97 (patch) | |
| tree | 3c7ec119cf89f82737c55235ff7881ebeed9408f | |
| parent | b12362bdb61a230a67daa77bcd2a11e59b2802e1 (diff) | |
vfs: avoid taking inode_hash_lock on pipes and sockets
Some inodes (pipes, sockets, ...) are not hashed, no need to take
contended inode_hash_lock at dismantle time.
nice speedup on SMP machines on socket intensive workloads.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/inode.c | 6 | ||||
| -rw-r--r-- | include/linux/fs.h | 9 |
2 files changed, 11 insertions, 4 deletions
diff --git a/fs/inode.c b/fs/inode.c index 9dab13ae6ef7..e445be2a18f9 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -399,12 +399,12 @@ void __insert_inode_hash(struct inode *inode, unsigned long hashval) EXPORT_SYMBOL(__insert_inode_hash); /** - * remove_inode_hash - remove an inode from the hash + * __remove_inode_hash - remove an inode from the hash * @inode: inode to unhash * * Remove an inode from the superblock. */ -void remove_inode_hash(struct inode *inode) +void __remove_inode_hash(struct inode *inode) { spin_lock(&inode_hash_lock); spin_lock(&inode->i_lock); @@ -412,7 +412,7 @@ void remove_inode_hash(struct inode *inode) spin_unlock(&inode->i_lock); spin_unlock(&inode_hash_lock); } -EXPORT_SYMBOL(remove_inode_hash); +EXPORT_SYMBOL(__remove_inode_hash); void end_writeback(struct inode *inode) { diff --git a/include/linux/fs.h b/include/linux/fs.h index f23bcb77260c..786b3b1113cf 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2317,11 +2317,18 @@ extern int should_remove_suid(struct dentry *); extern int file_remove_suid(struct file *); extern void __insert_inode_hash(struct inode *, unsigned long hashval); -extern void remove_inode_hash(struct inode *); static inline void insert_inode_hash(struct inode *inode) { __insert_inode_hash(inode, inode->i_ino); } + +extern void __remove_inode_hash(struct inode *); +static inline void remove_inode_hash(struct inode *inode) +{ + if (!inode_unhashed(inode)) + __remove_inode_hash(inode); +} + extern void inode_sb_list_add(struct inode *inode); #ifdef CONFIG_BLOCK |