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| author | Mark Fasheh <mfasheh@suse.com> | 2008-11-25 02:02:08 +0100 |
|---|---|---|
| committer | Mark Fasheh <mfasheh@suse.com> | 2009-04-03 20:39:16 +0200 |
| commit | 4ed8a6bb083bfcc21f1ed66a474b03c0386e4b34 (patch) | |
| tree | 89cc2629bed3949e980edcae3d807e71718a9028 /fs/ocfs2/journal.h | |
| parent | ocfs2: Add a name indexed b-tree to directory inodes (diff) | |
| download | linux-4ed8a6bb083bfcc21f1ed66a474b03c0386e4b34.tar.xz linux-4ed8a6bb083bfcc21f1ed66a474b03c0386e4b34.zip | |
ocfs2: Store dir index records inline
Allow us to store a small number of directory index records in the
ocfs2_dx_root_block. This saves us a disk read on small to medium sized
directories (less than about 250 entries). The inline root is automatically
turned into a root block with extents if the directory size increases beyond
it's capacity.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/journal.h')
| -rw-r--r-- | fs/ocfs2/journal.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h index 4939c04290ca..5585dde91344 100644 --- a/fs/ocfs2/journal.h +++ b/fs/ocfs2/journal.h @@ -458,6 +458,16 @@ static inline int ocfs2_rename_credits(struct super_block *sb) #define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \ OCFS2_SUBALLOC_FREE) +static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb) +{ + int credits = 1 + OCFS2_SUBALLOC_ALLOC; + + credits += ocfs2_clusters_to_blocks(sb, 1); + credits += ocfs2_quota_trans_credits(sb); + + return credits; +} + /* * Please note that the caller must make sure that root_el is the root * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise |