diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 7f689ad7709c..a97399f5ac6b 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -5573,6 +5573,8 @@ int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num)
 	if (test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags))
 		return 0;
 
+	pr_info("%s: eb->start=%llu mirror=%d\n", __func__, eb->start,
+			mirror_num);
 	num_pages = num_extent_pages(eb);
 	for (i = 0; i < num_pages; i++) {
 		page = eb->pages[i];
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index badb972919eb..03dd432b9812 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6374,6 +6374,11 @@ static void submit_stripe_bio(struct btrfs_bio *bbio, struct bio *bio,
 	btrfs_io_bio(bio)->device = dev;
 	bio->bi_end_io = btrfs_end_bio;
 	bio->bi_iter.bi_sector = physical >> 9;
+
+	pr_info("%s: rw %d 0x%x, phy=%llu sector=%llu dev_id=%llu size=%u\n", __func__,
+		bio_op(bio), bio->bi_opf, ((u64)bio->bi_iter.bi_sector) << 9,
+		bio->bi_iter.bi_sector,
+		dev->devid, bio->bi_iter.bi_size);
 	btrfs_debug_in_rcu(fs_info,
 	"btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
 		bio_op(bio), bio->bi_opf, bio->bi_iter.bi_sector,
@@ -6670,6 +6675,8 @@ static int read_one_chunk(struct btrfs_key *key, struct extent_buffer *leaf,
 		return -ENOMEM;
 	}
 
+	pr_info("%s: chunk start=%llu len=%llu num_stripes=%d type=0x%llx\n", __func__,
+		logical, length, num_stripes, btrfs_chunk_type(leaf, chunk));
 	set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);
 	em->map_lookup = map;
 	em->start = logical;
@@ -6694,6 +6701,9 @@ static int read_one_chunk(struct btrfs_key *key, struct extent_buffer *leaf,
 		read_extent_buffer(leaf, uuid, (unsigned long)
 				   btrfs_stripe_dev_uuid_nr(chunk, i),
 				   BTRFS_UUID_SIZE);
+		pr_info("%s:    stripe %u phy=%llu devid=%llu\n", __func__,
+			i, btrfs_stripe_offset_nr(leaf, chunk, i),
+			devid);
 		map->stripes[i].dev = btrfs_find_device(fs_info->fs_devices,
 							devid, uuid, NULL);
 		if (!map->stripes[i].dev &&