[PATCH 10/27] Initialize timehands linkage much earlier.
Moyano, Gabriel
gabriel.moyano at dlr.de
Wed Nov 17 07:50:22 UTC 2021
From: Konstantin Belousov <kib at FreeBSD.org>
Reported and tested by: trasz
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
---
cpukit/score/src/kern_tc.c | 34 ++++++++++++++++++++++------------
1 file changed, 22 insertions(+), 12 deletions(-)
diff --git a/cpukit/score/src/kern_tc.c b/cpukit/score/src/kern_tc.c
index 3aa68f7595..0051d49330 100644
--- a/cpukit/score/src/kern_tc.c
+++ b/cpukit/score/src/kern_tc.c
@@ -245,7 +245,8 @@ SYSCTL_INT(_kern_timecounter, OID_AUTO, stepwarnings, CTLFLAG_RW,
×tepwarnings, 0, "Log time steps");
static int timehands_count = 2;
-SYSCTL_INT(_kern_timecounter, OID_AUTO, timehands_count, CTLFLAG_RDTUN,
+SYSCTL_INT(_kern_timecounter, OID_AUTO, timehands_count,
+ CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
&timehands_count, 0, "Count of timehands in rotation");
struct bintime bt_timethreshold;
@@ -2242,12 +2243,30 @@ done:
return (0);
}
+/* Set up the requested number of timehands. */
static void
-inittimecounter(void *dummy)
+inittimehands(void *dummy)
{
struct timehands *thp;
+ int i;
+
+ TUNABLE_INT_FETCH("kern.timecounter.timehands_count",
+ &timehands_count);
+ if (timehands_count < 1)
+ timehands_count = 1;
+ if (timehands_count > nitems(ths))
+ timehands_count = nitems(ths);
+ for (i = 1, thp = &ths[0]; i < timehands_count; thp = &ths[i++])
+ thp->th_next = &ths[i];
+ thp->th_next = &ths[0];
+}
+SYSINIT(timehands, SI_SUB_TUNABLES, SI_ORDER_ANY, inittimehands, NULL);
+
+static void
+inittimecounter(void *dummy)
+{
u_int p;
- int i, tick_rate;
+ int tick_rate;
/*
* Set the initial timeout to
@@ -2274,15 +2293,6 @@ inittimecounter(void *dummy)
ffclock_init();
#endif
- /* Set up the requested number of timehands. */
- if (timehands_count < 1)
- timehands_count = 1;
- if (timehands_count > nitems(ths))
- timehands_count = nitems(ths);
- for (i = 1, thp = &ths[0]; i < timehands_count; thp = &ths[i++])
- thp->th_next = &ths[i];
- thp->th_next = &ths[0];
-
/* warm up new timecounter (again) and get rolling. */
(void)timecounter->tc_get_timecount(timecounter);
(void)timecounter->tc_get_timecount(timecounter);
--
2.17.1
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