Index: subr_witness.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/subr_witness.c,v
retrieving revision 1.183
diff -u -r1.183 subr_witness.c
--- subr_witness.c	9 Nov 2004 06:46:14 -0000	1.183
+++ subr_witness.c	26 Dec 2004 21:44:34 -0000
@@ -1721,6 +1721,13 @@
 	    instance->li_line);
 }
 
+static int
+witness_has_locks(struct thread *td)
+{
+
+	return (td->td_sleeplocks != NULL);
+}
+
 int
 witness_list_locks(struct lock_list_entry **lock_list)
 {
@@ -1917,6 +1924,27 @@
 	}
 }
 
+DB_SHOW_COMMAND(alllocks, db_witness_list_all)
+{
+	struct thread *td;
+	struct proc *p;
+
+	/*
+	 * It would be nice to list only threads and processes that actually
+	 * held sleep locks, but that information is currently not exported
+	 * by WITNESS.
+	 */
+	FOREACH_PROC_IN_SYSTEM(p) {
+		printf("Process %d (%s)\n", p->p_pid, p->p_comm);
+		FOREACH_THREAD_IN_PROC(p, td) {
+			if (!witness_has_locks(td))
+				continue;
+			printf("  Thread 0x%x\n", td->td_tid);
+			witness_list(td);
+		}
+	}
+}
+
 DB_SHOW_COMMAND(witness, db_witness_display)
 {