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fs: dcache per-inode inode alias locking

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dcache_inode_lock can be replaced with per-inode locking. Use existing
inode->i_lock for this. This is slightly non-trivial because we sometimes
need to find the inode from the dentry, which requires d_inode to be
stabilised (either with refcount or d_lock).

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
This commit is contained in:
Nick Piggin
2011-01-07 17:50:06 +11:00
parent ceb5bdc2d2
commit 873feea09e
9 changed files with 67 additions and 60 deletions
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4
fs/notify/fsnotify.c
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@ -59,7 +59,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
/* determine if the children should tell inode about their events */
watched = fsnotify_inode_watches_children(inode);
spin_lock(&dcache_inode_lock);
spin_lock(&inode->i_lock);
/* run all of the dentries associated with this inode. Since this is a
* directory, there damn well better only be one item on this list */
list_for_each_entry(alias, &inode->i_dentry, d_alias) {
@ -82,7 +82,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
}
spin_unlock(&alias->d_lock);
}
spin_unlock(&dcache_inode_lock);
spin_unlock(&inode->i_lock);
}
/* Notify this dentry's parent about a child's events. */