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/sysfile.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/ocfs2/sysfile.c') diff --git a/fs/ocfs2/sysfile.c b/fs/ocfs2/sysfile.c index 98435002ac44..5df6e35d09b1 100644 --- a/fs/ocfs2/sysfile.c +++ b/fs/ocfs2/sysfile.c @@ -115,7 +115,7 @@ static struct inode * _ocfs2_get_system_file_inode(struct ocfs2_super *osb, goto bail; } - inode = ocfs2_iget(osb, blkno); + inode = ocfs2_iget(osb, blkno, OCFS2_FI_FLAG_SYSFILE); if (IS_ERR(inode)) { mlog_errno(PTR_ERR(inode)); inode = NULL; -- cgit