Index: sys/kern/vfs_bio.c
===================================================================
--- sys/kern/vfs_bio.c
+++ sys/kern/vfs_bio.c
@@ -4924,12 +4924,14 @@
 		db_printf("\n");
 	}
 #if defined(FULL_BUF_TRACKING)
-	db_printf("b_io_tracking: b_io_tcnt = %u\n", bp->b_io_tcnt);
-
+	db_printf("b_io_tcnt = %u, b_io_tracking: ", bp->b_io_tcnt);
 	i = bp->b_io_tcnt % BUF_TRACKING_SIZE;
-	for (j = 1; j <= BUF_TRACKING_SIZE; j++)
-		db_printf(" %2u: %s\n", j,
-		    bp->b_io_tracking[BUF_TRACKING_ENTRY(i - j)]);
+	for (j = 1; j <= bp->b_io_tcnt; j++) {
+		db_printf("%s%s",
+		    bp->b_io_tracking[BUF_TRACKING_ENTRY(i - j)],
+		    j == bp->b_io_tcnt ? "" : ", ");
+	}
+	db_printf("\n");
 #elif defined(BUF_TRACKING)
 	db_printf("b_io_tracking: %s\n", bp->b_io_tracking);
 #endif