linux/fs/ocfs2/cluster
Mark Fasheh 24c19ef404 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 <mark.fasheh@oracle.com>
2006-09-24 13:50:46 -07:00
..
Makefile [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
endian.h [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
heartbeat.c ocfs2: Fix heartbeat sector calculation 2006-09-20 15:50:53 -07:00
heartbeat.h [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
masklog.c ocfs2: Set .owner on masklog sysfs attributes. 2006-03-01 11:43:20 -08:00
masklog.h ocfs2: Compile-time disabling of ocfs2 debugging output. 2006-06-29 14:48:30 -07:00
nodemanager.c [PATCH] ocfs2: complete failure recovery for nodemanager init 2006-03-01 11:29:30 -08:00
nodemanager.h [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
ocfs2_heartbeat.h ocfs2: warn the user on a dead timeout mismatch 2006-06-29 15:45:35 -07:00
ocfs2_nodemanager.h [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
quorum.c [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
quorum.h [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
sys.c [PATCH] This patch contains the following cleanups: 2006-01-03 11:45:55 -08:00
sys.h [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
tcp.c ocfs2: Cleanup message prints 2006-06-29 15:56:26 -07:00
tcp.h [PATCH] ocfs2: remove non existing function prototypes 2006-03-01 11:19:47 -08:00
tcp_internal.h ocfs2: Remove i_generation from inode lock names 2006-09-24 13:50:46 -07:00
ver.c [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00
ver.h [PATCH] OCFS2: The Second Oracle Cluster Filesystem 2006-01-03 11:45:46 -08:00