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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/ocfs2
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/ocfs2')
-rw-r--r--fs/ocfs2/dcache.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index 35e5f5a9ef59..c31b5c647ac7 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -170,7 +170,7 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
struct dentry *dentry = NULL;
spin_lock(&dcache_lock);
-
+ spin_lock(&dcache_inode_lock);
list_for_each(p, &inode->i_dentry) {
dentry = list_entry(p, struct dentry, d_alias);
@@ -188,6 +188,7 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
dentry = NULL;
}
+ spin_unlock(&dcache_inode_lock);
spin_unlock(&dcache_lock);
return dentry;