On 9/7/21 6:32 PM, Colin Percival wrote:
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.
Perhaps it should default to '1' for i386 and '0' otherwise? The relevant
chipsets were 32-bit only, so this would be a simple way to skip the test for
modern hardware, and you could probably MFC that safely.
--
John Baldwin
_______________________________________________
dev-commits-src-main@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/dev-commits-src-main
To unsubscribe, send any mail to "dev-commits-src-main-unsubscr...@freebsd.org"
