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Commit 01763a2e authored by Jan Schmidt's avatar Jan Schmidt
Browse files

Btrfs: comment for loop in tree_mod_log_insert_move 



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.

Signed-off-by: default avatarJan Schmidt <list.btrfs@jan-o-sch.net>
parent d6381084

fs/btrfs/ctree.c

+5 −0
Original line number Diff line number Diff line
@@ -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);