From 5e98d492406818e6a94c0ba54c61f59d40cefa4a Mon Sep 17 00:00:00 2001 From: Goldwyn Rodrigues Date: Mon, 28 Jun 2010 10:04:32 -0500 Subject: Track negative entries v3 Track negative dentries by recording the generation number of the parent directory in d_fsdata. The generation number for the parent directory is recorded in the inode_info, which increments every time the lock on the directory is dropped. If the generation number of the parent directory and the negative dentry matches, there is no need to perform the revalidate, else a revalidate is forced. This improves performance in situations where nodes look for the same non-existent file multiple times. Thanks Mark for explaining the DLM sequence. Signed-off-by: Goldwyn Rodrigues Signed-off-by: Joel Becker --- fs/ocfs2/namei.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/ocfs2/namei.c') diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c index a00dda2e4f1..e7bde21149a 100644 --- a/fs/ocfs2/namei.c +++ b/fs/ocfs2/namei.c @@ -171,7 +171,8 @@ bail_add: ret = ERR_PTR(status); goto bail_unlock; } - } + } else + ocfs2_dentry_attach_gen(dentry); bail_unlock: /* Don't drop the cluster lock until *after* the d_add -- -- cgit v1.2.3