diff --git a/kmod/src/scoutfs_trace.h b/kmod/src/scoutfs_trace.h
index fce7f9bb..ed2b30fd 100644
--- a/kmod/src/scoutfs_trace.h
+++ b/kmod/src/scoutfs_trace.h
@@ -38,6 +38,34 @@ struct lock_info;
 #define FSID_ARG(sb)	le64_to_cpu(SCOUTFS_SB(sb)->super.hdr.fsid)
 #define FSID_FMT	"%llx"
 
+DECLARE_EVENT_CLASS(scoutfs_segment_class,
+	TP_PROTO(struct super_block *sb, __u64 segno),
+
+	TP_ARGS(sb, segno),
+
+	TP_STRUCT__entry(
+		__field(__u64, fsid)
+		__field(__u64, segno)
+	),
+
+	TP_fast_assign(
+		__entry->fsid = FSID_ARG(sb);
+		__entry->segno = segno;
+	),
+
+	TP_printk(FSID_FMT" segno %llu", __entry->fsid, __entry->segno)
+);
+
+DEFINE_EVENT(scoutfs_segment_class, scoutfs_seg_submit_read,
+	TP_PROTO(struct super_block *sb, __u64 segno),
+	TP_ARGS(sb, segno)
+);
+
+DEFINE_EVENT(scoutfs_segment_class, scoutfs_seg_submit_write,
+	TP_PROTO(struct super_block *sb, __u64 segno),
+	TP_ARGS(sb, segno)
+);
+
 DECLARE_EVENT_CLASS(scoutfs_lock_info_class,
 	TP_PROTO(struct super_block *sb, struct lock_info *linfo),
 
diff --git a/kmod/src/seg.c b/kmod/src/seg.c
index 1cda3462..039530d4 100644
--- a/kmod/src/seg.c
+++ b/kmod/src/seg.c
@@ -305,7 +305,7 @@ struct scoutfs_segment *scoutfs_seg_submit_read(struct super_block *sb,
 	struct scoutfs_segment *seg;
 	unsigned long flags;
 
-	trace_printk("segno %llu\n", segno);
+	trace_scoutfs_seg_submit_read(sb, segno);
 
 	spin_lock_irqsave(&cac->lock, flags);
 	seg = find_seg(&cac->root, segno);
@@ -340,7 +340,7 @@ int scoutfs_seg_submit_write(struct super_block *sb,
 			     struct scoutfs_segment *seg,
 			     struct scoutfs_bio_completion *comp)
 {
-	trace_printk("submitting segno %llu\n", seg->segno);
+	trace_scoutfs_seg_submit_write(sb, seg->segno);
 
 	scoutfs_bio_submit_comp(sb, WRITE, seg->pages,
 				segno_to_blkno(seg->segno),