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authorMingming Cao <cmm@us.ibm.com>2008-08-19 22:16:05 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-08-19 22:16:05 -0400
commitee12b630687d510f6f4b6d4acdc4e267fd4adeda (patch)
tree8dd253073c5e811751bf1bb479fb03f772e42406 /fs/ext4/ext4_extents.h
parenta02908f19c819aeec5e3dcf238adaa6deddd70b0 (diff)
ext4: journal credits reservation fixes for extent file writepage
This patch modified the writepage/write_begin credit calculation for extent files, to use the credits caculation helper function. The current calculation of how many index/leaf blocks should be accounted is too conservetive, it always considered the worse case, where the tree level is 5, and in the case of multiple chunk allocations, it always assumed no blocks were dirtied in common across the allocations. This path uses the accurate depth of the inode with some extras to calculate the index blocks, and also less conservative in the case of multiple allocation accounting. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4_extents.h')
-rw-r--r--fs/ext4/ext4_extents.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index 6c166c0a54b7..d33dc56d6986 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -216,7 +216,9 @@ extern int ext4_ext_calc_metadata_amount(struct inode *inode, int blocks);
216extern ext4_fsblk_t idx_pblock(struct ext4_extent_idx *); 216extern ext4_fsblk_t idx_pblock(struct ext4_extent_idx *);
217extern void ext4_ext_store_pblock(struct ext4_extent *, ext4_fsblk_t); 217extern void ext4_ext_store_pblock(struct ext4_extent *, ext4_fsblk_t);
218extern int ext4_extent_tree_init(handle_t *, struct inode *); 218extern int ext4_extent_tree_init(handle_t *, struct inode *);
219extern int ext4_ext_calc_credits_for_insert(struct inode *, struct ext4_ext_path *); 219extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
220 int num,
221 struct ext4_ext_path *path);
220extern int ext4_ext_try_to_merge(struct inode *inode, 222extern int ext4_ext_try_to_merge(struct inode *inode,
221 struct ext4_ext_path *path, 223 struct ext4_ext_path *path,
222 struct ext4_extent *); 224 struct ext4_extent *);