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fs: scale inode alias list

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Add a new lock, dcache_inode_lock, to protect the inode's i_dentry list
from concurrent modification. d_alias is also protected by d_lock.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
This commit is contained in:
Nick Piggin
2011-01-07 17:49:35 +11:00
parent 2fd6b7f507
commit b23fb0a603
9 changed files with 78 additions and 9 deletions
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2
fs/notify/fsnotify.c
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@@ -60,6 +60,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
watched = fsnotify_inode_watches_children(inode);
spin_lock(&dcache_lock);
spin_lock(&dcache_inode_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) {
@@ -82,6 +83,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
}
spin_unlock(&alias->d_lock);
}
spin_unlock(&dcache_inode_lock);
spin_unlock(&dcache_lock);
}