![]() 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> |
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endian.h | ||
heartbeat.c | ||
heartbeat.h | ||
Makefile | ||
masklog.c | ||
masklog.h | ||
nodemanager.c | ||
nodemanager.h | ||
ocfs2_heartbeat.h | ||
ocfs2_nodemanager.h | ||
quorum.c | ||
quorum.h | ||
sys.c | ||
sys.h | ||
tcp.c | ||
tcp.h | ||
tcp_internal.h | ||
ver.c | ||
ver.h |