Jason A. Donenfeld 8776be6e6f wireguard: ratelimiter: use hrtimer in selftest ... [ Upstream commit 151c8e499f ] Using msleep() is problematic because it's compared against ratelimiter.c's ktime_get_coarse_boottime_ns(), which means on systems with slow jiffies (such as UML's forced HZ=100), the result is inaccurate. So switch to using schedule_hrtimeout(). However, hrtimer gives us access only to the traditional posix timers, and none of the _COARSE variants. So now, rather than being too imprecise like jiffies, it's too precise. One solution would be to give it a large "range" value, but this will still fire early on a loaded system. A better solution is to align the timeout to the actual coarse timer, and then round up to the nearest tick, plus change. So add the timeout to the current coarse time, and then schedule_hrtimer() until the absolute computed time. This should hopefully reduce flakes in CI as well. Note that we keep the retry loop in case the entire function is running behind, because the test could still be scheduled out, by either the kernel or by the hypervisor's kernel, in which case restarting the test and hoping to not be scheduled out still helps. Fixes: e7096c131e ("net: WireGuard secure network tunnel") Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-08-17 14:41:16 +02:00
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alarmtimer.c	alarmtimer: Check RTC features instead of ops	2021-05-11 21:28:04 +02:00
clockevents.c	clockevents: Use list_move() instead of list_del()/list_add()	2021-06-22 17:16:46 +02:00
clocksource-wdtest.c	clocksource: Make clocksource watchdog test safe for slow-HZ systems	2021-08-28 17:01:32 +02:00
clocksource.c	clocksource: Add a Kconfig option for WATCHDOG_MAX_SKEW	2022-02-01 17:35:43 -08:00
hrtimer.c	wireguard: ratelimiter: use hrtimer in selftest	2022-08-17 14:41:16 +02:00
itimer.c
jiffies.c	clocksource: Make clocksource watchdog test safe for slow-HZ systems	2021-08-28 17:01:32 +02:00
Kconfig	clocksource: Add a Kconfig option for WATCHDOG_MAX_SKEW	2022-02-01 17:35:43 -08:00
Makefile	time: Improve performance of time64_to_tm()	2021-06-24 11:51:59 +02:00
namespace.c	memcg: enable accounting for new namesapces and struct nsproxy	2021-09-03 09:58:12 -07:00
ntp.c
ntp_internal.h
posix-clock.c
posix-cpu-timers.c	ptrace: Cleanups for v5.18	2022-03-28 17:29:53 -07:00
posix-stubs.c
posix-timers.c	fix race between exit_itimers() and /proc/pid/timers	2022-07-22 10:21:18 +02:00
posix-timers.h
sched_clock.c
test_udelay.c
tick-broadcast-hrtimer.c
tick-broadcast.c	timer_list: Print name of per-cpu wakeup device	2021-05-31 17:04:49 +02:00
tick-common.c	timekeeping: Distangle resume and clock-was-set events	2021-08-10 17:57:23 +02:00
tick-internal.h	clocksource: Make clocksource watchdog test safe for slow-HZ systems	2021-08-28 17:01:32 +02:00
tick-legacy.c
tick-oneshot.c
tick-sched.c	tick/nohz: unexport __init-annotated tick_nohz_full_setup()	2022-07-02 16:44:55 +02:00
tick-sched.h	tick: Detect and fix jiffies update stall	2022-03-07 23:01:19 +01:00
time.c
time_test.c	time/kunit: Add missing MODULE_LICENSE()	2021-06-28 07:40:23 +02:00
timeconst.bc
timeconv.c	time: Improve performance of time64_to_tm()	2021-06-24 11:51:59 +02:00
timecounter.c
timekeeping.c	timekeeping: Add raw clock fallback for random_get_entropy()	2022-05-30 09:24:04 +02:00
timekeeping.h
timekeeping_debug.c
timekeeping_internal.h
timer.c	timers: Fix warning condition in __run_timers()	2022-04-09 22:17:47 +02:00
timer_list.c	timer_list: Print name of per-cpu wakeup device	2021-05-31 17:04:49 +02:00
vsyscall.c