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| author | Mark Fasheh <mfasheh@suse.com> | 2009-01-29 18:17:46 -0800 |
|---|---|---|
| committer | Mark Fasheh <mfasheh@suse.com> | 2009-04-03 11:39:16 -0700 |
| commit | e7c17e43090afe558c40bfb66637744c27bd2aeb (patch) | |
| tree | 4c164c4ec59eaa7599c91f865a261517454ba45f /fs/ocfs2/ocfs2_fs.h | |
| parent | 4ed8a6bb083bfcc21f1ed66a474b03c0386e4b34 (diff) | |
| download | linux-e7c17e43090afe558c40bfb66637744c27bd2aeb.tar.gz linux-e7c17e43090afe558c40bfb66637744c27bd2aeb.tar.bz2 linux-e7c17e43090afe558c40bfb66637744c27bd2aeb.zip | |
ocfs2: Introduce dir free space list
The only operation which doesn't get faster with directory indexing is
insert, which still has to walk the entire unindexed directory portion to
find a free block. This patch provides an improvement in directory insert
performance by maintaining a singly linked list of directory leaf blocks
which have space for additional dirents.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/ocfs2_fs.h')
| -rw-r--r-- | fs/ocfs2/ocfs2_fs.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index 1d1c54ea5bc4..d549b1799a61 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -416,6 +416,7 @@ static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = { #define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \ OCFS2_DIR_ROUND) & \ ~OCFS2_DIR_ROUND) +#define OCFS2_DIR_MIN_REC_LEN OCFS2_DIR_REC_LEN(1) #define OCFS2_LINK_MAX 32000 @@ -842,7 +843,9 @@ struct ocfs2_dx_root_block { __le16 dr_reserved1; __le64 dr_dir_blkno; /* Pointer to parent inode */ __le64 dr_reserved2; - __le64 dr_reserved3[16]; + __le64 dr_free_blk; /* Pointer to head of free + * unindexed block list. */ + __le64 dr_reserved3[15]; union { struct ocfs2_extent_list dr_list; /* Keep this aligned to 128 * bits for maximum space |