From 24c19ef40474c3930597f31ae233dc06319bd881 Mon Sep 17 00:00:00 2001 From: Mark Fasheh Date: Fri, 22 Sep 2006 17:28:19 -0700 Subject: ocfs2: Remove i_generation from inode lock names OCFS2 puts inode meta data in the "lock value block" provided by the DLM. Typically, i_generation is encoded in the lock name so that a deleted inode on and a new one in the same block don't share the same lvb. Unfortunately, that scheme means that the read in ocfs2_read_locked_inode() is potentially thrown away as soon as the meta data lock is taken - we cannot encode the lock name without first knowing i_generation, which requires a disk read. This patch encodes i_generation in the inode meta data lvb, and removes the value from the inode meta data lock name. This way, the read can be covered by a lock, and at the same time we can distinguish between an up to date and a stale LVB. This will help cold-cache stat(2) performance in particular. Since this patch changes the protocol version, we take the opportunity to do a minor re-organization of two of the LVB fields. Signed-off-by: Mark Fasheh --- fs/ocfs2/super.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/ocfs2/super.c') diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 33a6de6fc61..4c29cd7cc8e 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -202,7 +202,7 @@ static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) mlog_entry_void(); - new = ocfs2_iget(osb, osb->root_blkno); + new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE); if (IS_ERR(new)) { status = PTR_ERR(new); mlog_errno(status); @@ -210,7 +210,7 @@ static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) } osb->root_inode = new; - new = ocfs2_iget(osb, osb->system_dir_blkno); + new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE); if (IS_ERR(new)) { status = PTR_ERR(new); mlog_errno(status); -- cgit v1.2.3