On 10/23/2012 09:55 PM, Jan Schmidt wrote:
> Emphasis the way tree_mod_log_insert_move avoids adding
> MOD_LOG_KEY_REMOVE_WHILE_MOVING operations, depending on the direction of
> the move operation.
>
Good work.
Reviewed-by: Liu Bo <bo.li....@oracle.com>
thanks,
liubo
> Signed-off-by: Jan Schmidt <list.bt...@jan-o-sch.net>
> ---
> fs/btrfs/ctree.c | 5 +++++
> 1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
> index bed06e8..c608b3c 100644
> --- a/fs/btrfs/ctree.c
> +++ b/fs/btrfs/ctree.c
> @@ -596,6 +596,11 @@ tree_mod_log_insert_move(struct btrfs_fs_info *fs_info,
> if (tree_mod_dont_log(fs_info, eb))
> return 0;
>
> + /*
> + * When we override something during the move, we log these removals.
> + * This can only happen when we move towards the beginning of the
> + * buffer, i.e. dst_slot < src_slot.
> + */
> for (i = 0; i + dst_slot < src_slot && i < nr_items; i++) {
> ret = tree_mod_log_insert_key_locked(fs_info, eb, i + dst_slot,
> MOD_LOG_KEY_REMOVE_WHILE_MOVING);
>
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