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authorGoldwyn Rodrigues <rgoldwyn@gmail.com>2010-06-28 10:04:32 -0500
committerJoel Becker <joel.becker@oracle.com>2010-09-10 09:18:15 -0700
commit5e98d492406818e6a94c0ba54c61f59d40cefa4a (patch)
tree9eec0813194dd2192f6ae05d2f344e7839d2ab44 /fs/ocfs2/dlmglue.c
parentb4d693fcc5fe99ed211addb5c6a0f8398f0b266e (diff)
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 <rgoldwyn@suse.de> Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/dlmglue.c')
-rw-r--r--fs/ocfs2/dlmglue.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 5e02a893f46..e8d94d722ec 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3635,10 +3635,18 @@ static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
{
struct inode *inode;
struct address_space *mapping;
+ struct ocfs2_inode_info *oi;
inode = ocfs2_lock_res_inode(lockres);
mapping = inode->i_mapping;
+ if (S_ISDIR(inode->i_mode)) {
+ oi = OCFS2_I(inode);
+ oi->ip_dir_lock_gen++;
+ mlog(0, "generation: %u\n", oi->ip_dir_lock_gen);
+ goto out;
+ }
+
if (!S_ISREG(inode->i_mode))
goto out;