diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index f5de8ab9787e..be2e20d163ef 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -304,6 +304,11 @@ static int __btrfs_run_defrag_inode(struct btrfs_fs_info *fs_info,
 	sb_start_write(fs_info->sb);
 	ret = btrfs_defrag_file(inode, NULL, &ctrl);
 	sb_end_write(fs_info->sb);
+	trace_printk("defrag finish r/i=%lld/%llu ret=%d defragged=%llu last_scanned=%llu last_off=%llu cycled=%d\n",
+		     BTRFS_I(inode)->root->root_key.objectid,
+		     btrfs_ino(BTRFS_I(inode)), ret, ctrl.sectors_defragged,
+		     ctrl.last_scanned,
+		     defrag->last_offset, defrag->cycled);
 	/*
 	 * if we filled the whole defrag batch, there
 	 * must be more work to do.  Queue this defrag
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 133e3e2e2e79..a0501c88922b 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1420,6 +1420,11 @@ static int defrag_collect_targets(struct btrfs_inode *inode,
 add:
 		last_is_target = true;
 		range_len = min(extent_map_end(em), start + len) - cur;
+
+		trace_printk("add target r/i=%lld/%llu start=%llu len=%llu em=%llu len=%llu gen=%lld newer=%llu\n",
+			inode->root->root_key.objectid,
+			btrfs_ino(inode), cur, range_len, em->start, em->len,
+			em->generation, ctrl->newer_than);
 		/*
 		 * This one is a good target, check if it can be merged into
 		 * last range of the target list.
@@ -1520,6 +1525,9 @@ static int defrag_one_locked_target(struct btrfs_inode *inode,
 			 EXTENT_DEFRAG, 0, 0, cached_state);
 	set_extent_defrag(&inode->io_tree, start, start + len - 1, cached_state);
 
+	trace_printk("defrag target r/i=%lld/%llu start=%llu len=%llu\n",
+			inode->root->root_key.objectid,
+			btrfs_ino(inode), start, len);
 	/* Update the page status */
 	for (i = start_index - first_index; i <= last_index - first_index; i++) {
 		ClearPageChecked(pages[i]);
@@ -1786,6 +1794,12 @@ int btrfs_defrag_file(struct inode *inode, struct file_ra_state *ra,
 	if (start_index < inode->i_mapping->writeback_index)
 		inode->i_mapping->writeback_index = start_index;
 
+	trace_printk("entry r/i=%lld/%llu start=%llu len=%llu newer=%llu thres=%u\n",
+		BTRFS_I(inode)->root->root_key.objectid,
+		btrfs_ino(BTRFS_I(inode)),
+		ctrl->last_scanned, last_byte + 1 - ctrl->last_scanned,
+		ctrl->newer_than, ctrl->extent_thresh);
+
 	while (ctrl->last_scanned < last_byte) {
 		const unsigned long prev_sectors_defragged = ctrl->sectors_defragged;
 		u64 cluster_end;