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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:35 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:22 +1100
commitb23fb0a60379a95e10c671f646b259ea2558421e (patch)
tree7c3644b91241d32fda502a7be0b78e4c225f8091 /fs/notify
parent2fd6b7f50797f2e993eea59e0a0b8c6399c811dc (diff)
fs: scale inode alias list
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>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fsnotify.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index aa4f25e803f..ae769fc9b66 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -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);
}