The branch main has been updated by cperciva:
URL:
https://cgit.FreeBSD.org/src/commit/?id=a8b89dff6ac026e60983824889d3666842ff409b
commit a8b89dff6ac026e60983824889d3666842ff409b
Author: Colin Percival <cperc...@freebsd.org>
AuthorDate: 2021-09-07 23:59:45 +0000
Commit: Colin Percival <cperc...@freebsd.org>
CommitDate: 2021-09-08 01:31:55 +0000
Disable acpi_timer_test by default
This disables testing the ACPI timer by default, forcing the use of
ACPI-fast rather than ACPI-safe. The broken-ACPI-timers workaround
can be re-enabled by setting the hw.acpi.timer_test_enabled=1 tunable.
This speeds up the FreeBSD boot process by 140 ms on an EC2 c5.xlarge
instance.
This change will not be MFCed.
Assuming no problems are reported, acpi_timer_test, the associated
tunable, and the ACPI-safe timecounter should be removed in FreeBSD 15.
Relnotes: The ACPI-safe timer is disabled in favour of ACPI-fast;
if timekeeping issues are observed, please test with
hw.acpi.timer_test_enabled=1 in loader.conf and report
if that fixes the problem.
---
sys/dev/acpica/acpi_timer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sys/dev/acpica/acpi_timer.c b/sys/dev/acpica/acpi_timer.c
index 8be6e0edea7f..8e3947709b61 100644
--- a/sys/dev/acpica/acpi_timer.c
+++ b/sys/dev/acpica/acpi_timer.c
@@ -79,7 +79,7 @@ static int acpi_timer_sysctl_freq(SYSCTL_HANDLER_ARGS);
static void acpi_timer_boot_test(void);
static int acpi_timer_test(void);
-static int acpi_timer_test_enabled = 1;
+static int acpi_timer_test_enabled = 0;
TUNABLE_INT("hw.acpi.timer_test_enabled", &acpi_timer_test_enabled);
static device_method_t acpi_timer_methods[] = {
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