From: cheloha <cheloha@openbsd.org>
Date: Sun, 18 Sep 2022 20:47:09 +0000 (+0000)
Subject: timecounting: tc_reset_quality: print notice if active counter changes
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=4c0ab4286c30ae2a8da7bc291ee43621c4231618;p=openbsd

timecounting: tc_reset_quality: print notice if active counter changes

Give the user a hint as to what happened if they boot up and the TSC
is not the active counter.

"sure" deraadt@
---

diff --git a/sys/kern/kern_tc.c b/sys/kern/kern_tc.c
index b89170a573a..3509b8f2bd9 100644
--- a/sys/kern/kern_tc.c
+++ b/sys/kern/kern_tc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_tc.c,v 1.77 2022/08/12 02:20:36 cheloha Exp $ */
+/*	$OpenBSD: kern_tc.c,v 1.78 2022/09/18 20:47:09 cheloha Exp $ */
 
 /*
  * Copyright (c) 2000 Poul-Henning Kamp <phk@FreeBSD.org>
@@ -486,6 +486,8 @@ tc_reset_quality(struct timecounter *tc, int quality)
 		if (best != tc) {
 			enqueue_randomness(best->tc_get_timecount(best));
 			timecounter = best;
+			printf("timecounter: active counter changed: %s -> %s\n",
+			    tc->tc_name, best->tc_name);
 		}
 	}
 }