Index: share/man/man4/ddb.4
===================================================================
--- share/man/man4/ddb.4
+++ share/man/man4/ddb.4
@@ -560,8 +560,8 @@
 .Pp
 .It Ic show Cm allrman
 Show information related with resource management, including
-interrupt request lines, DMA request lines, I/O ports and I/O memory
-addresses.
+interrupt request lines, DMA request lines, I/O ports, I/O memory
+addresses, and Resource IDs.
 .\"
 .Pp
 .It Ic show Cm apic
Index: sys/kern/subr_rman.c
===================================================================
--- sys/kern/subr_rman.c
+++ sys/kern/subr_rman.c
@@ -1051,7 +1051,8 @@
 				devname = "nomatch";
 		} else
 			devname = NULL;
-		db_printf("    0x%lx-0x%lx ", r->r_start, r->r_end);
+		db_printf("    0x%lx-0x%lx (RID=%d) ",
+		    r->r_start, r->r_end, r->r_rid);
 		if (devname != NULL)
 			db_printf("(%s)\n", devname);
 		else