It is reasonable to prepent newly created index to older one.
Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
---
fs/ext4/extents.c | 15 ++++++++++++---
1 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 8170b32..37267ea 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1268,11 +1268,20 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
{
struct ext4_extent_header *neh;
struct buffer_head *bh;
- ext4_fsblk_t newblock;
+ ext4_fsblk_t newblock, goal = 0;
+ struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
int err = 0;
- newblock = ext4_ext_new_meta_block(handle, inode, NULL,
- newext, &err, flags);
+ /* Try to prepend new index to old one */
+ if (ext_depth(inode))
+ goal = ext4_idx_pblock(EXT_FIRST_INDEX(ext_inode_hdr(inode)));
+ if (goal > le32_to_cpu(es->s_first_data_block)) {
+ flags |= EXT4_MB_HINT_TRY_GOAL;
+ goal--;
+ } else
+ goal = ext4_inode_to_goal_block(inode);
+ newblock = ext4_new_meta_blocks(handle, inode, goal, flags,
+ NULL, &err);
if (newblock == 0)
return err;
--
1.7.1
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