diff --git a/kmod/src/btree.c b/kmod/src/btree.c
index 006eacd3..1ba1c132 100644
--- a/kmod/src/btree.c
+++ b/kmod/src/btree.c
@@ -754,6 +754,12 @@ retry:
 	if (le64_to_cpu(bring->next_block) == le64_to_cpu(bring->nr_blocks))
 		bring->next_block = 0;
 
+	trace_scoutfs_btree_dirty_block(sb, blkno, seq,
+		le64_to_cpu(bring->next_block), le64_to_cpu(bring->next_seq),
+		bti->cur_dirtied, bti->old_dirtied,
+		bt ? le64_to_cpu(bt->hdr.blkno) : 0,
+		bt ? le64_to_cpu(bt->hdr.seq) : 0);
+
 	/* force advancing if migration's done and we didn't just wrap */
 	if (all_roots_migrated(super) && !first_block_in_half(bring) &&
 	    scoutfs_trigger(sb, BTREE_ADVANCE_RING_HALF))
diff --git a/kmod/src/scoutfs_trace.h b/kmod/src/scoutfs_trace.h
index 08d4572b..a9c6cfe3 100644
--- a/kmod/src/scoutfs_trace.h
+++ b/kmod/src/scoutfs_trace.h
@@ -2258,6 +2258,44 @@ TRACE_EVENT(scoutfs_btree_read_error,
 		  __entry->fsid, __entry->blkno, __entry->seq)
 );
 
+TRACE_EVENT(scoutfs_btree_dirty_block,
+	TP_PROTO(struct super_block *sb, u64 blkno, u64 seq, u64 next_block,
+		u64 next_seq, unsigned long cur_dirtied,
+		unsigned long old_dirtied, u64 bt_blkno, u64 bt_seq),
+
+	TP_ARGS(sb, blkno, seq, next_block, next_seq, cur_dirtied, old_dirtied,
+		bt_blkno, bt_seq),
+
+	TP_STRUCT__entry(
+		__field(__u64, fsid)
+		__field(__u64, blkno)
+		__field(__u64, seq)
+		__field(__u64, next_block)
+		__field(__u64, next_seq)
+		__field(unsigned long, cur_dirtied)
+		__field(unsigned long, old_dirtied)
+		__field(__u64, bt_blkno)
+		__field(__u64, bt_seq)
+	),
+
+	TP_fast_assign(
+		__entry->fsid = FSID_ARG(sb);
+		__entry->blkno = blkno;
+		__entry->seq = seq;
+		__entry->next_block = next_block;
+		__entry->next_seq = next_seq;
+		__entry->cur_dirtied = cur_dirtied;
+		__entry->old_dirtied = old_dirtied;
+		__entry->bt_blkno = bt_blkno;
+		__entry->bt_seq = bt_seq;
+	),
+
+	TP_printk("fsid "FSID_FMT" blkno %llu seq %llu next_block %llu next_seq %llu cur_dirtied %lu old_dirtied %lu bt_blkno %llu bt_seq %llu",
+		  __entry->fsid, __entry->blkno, __entry->seq,
+		  __entry->next_block, __entry->next_seq, __entry->cur_dirtied,
+		  __entry->old_dirtied, __entry->bt_blkno, __entry->bt_seq)
+);
+
 DECLARE_EVENT_CLASS(scoutfs_extent_class,
 	TP_PROTO(struct super_block *sb, struct scoutfs_extent *ext),