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40e97e4296
linux/kernel/time
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Paul Gortmaker 40e97e4296 tick/nohz: Use WARN_ON_ONCE() to prevent console saturation 
While running some testing on code that happened to allow the variable
tick_nohz_full_running to get set but with no "possible" NOHZ cores to
back up that setting, this warning triggered:

        if (unlikely(tick_do_timer_cpu == TICK_DO_TIMER_NONE))
                WARN_ON(tick_nohz_full_running);

The console was overwhemled with an endless stream of one WARN per tick
per core and there was no way to even see what was going on w/o using a
serial console to capture it and then trace it back to this.

Change it to WARN_ON_ONCE().

Fixes: 08ae95f4fd ("nohz_full: Allow the boot CPU to be nohz_full")
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211206145950.10927-3-paul.gortmaker@windriver.com
2022-04-10 12:23:34 +02:00
..
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 hrtimer: Unbreak hrtimer_force_reprogram() 2021-08-12 22:34:40 +02:00
itimer.c time: Prevent undefined behaviour in timespec64_to_ns() 2020-10-26 11:48:11 +01:00
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_internal.h ntp: Make the RTC synchronization more reliable 2020-12-11 10:40:52 +01:00
ntp.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
posix-clock.c posix-clocks: Rename the clock_get() callback to clock_get_timespec() 2020-01-14 12:20:49 +01:00
posix-cpu-timers.c ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
posix-stubs.c posix-timers: Make clock_nanosleep() time namespace aware 2020-01-14 12:20:55 +01:00
posix-timers.c Merge branch 'akpm' (patches from Andrew) 2021-09-03 10:08:28 -07:00
posix-timers.h posix-clocks: Introduce clock_get_ktime() callback 2020-01-14 12:20:51 +01:00
sched_clock.c time/sched_clock: Mark sched_clock_read_begin/retry() as notrace 2020-10-26 11:34:31 +01:00
test_udelay.c time/debug: Remove dentry pointer for debugfs 2021-03-18 11:20:26 +01:00
tick-broadcast-hrtimer.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
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 timekeeping: remove xtime_update 2020-10-30 21:57:07 +01:00
tick-oneshot.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
tick-sched.c tick/nohz: Use WARN_ON_ONCE() to prevent console saturation 2022-04-10 12:23:34 +02:00
tick-sched.h tick: Detect and fix jiffies update stall 2022-03-07 23:01:19 +01:00
time_test.c time/kunit: Add missing MODULE_LICENSE() 2021-06-28 07:40:23 +02:00
time.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00
timeconst.bc
timeconv.c time: Improve performance of time64_to_tm() 2021-06-24 11:51:59 +02:00
timecounter.c time/timecounter: Mark 1st argument of timecounter_cyc2time() as const 2021-04-16 21:03:50 +02:00
timekeeping_debug.c timekeeping/debug: No need to check return value of debugfs_create functions 2019-01-29 20:08:41 +01:00
timekeeping_internal.h timekeeping/vsyscall: Provide vdso_update_begin/end() 2020-08-06 10:57:30 +02:00
timekeeping.c timekeeping: Really make sure wall_to_monotonic isn't positive 2021-12-17 23:06:22 +01:00
timekeeping.h asm-generic: cross-architecture timer cleanup 2020-12-16 00:07:17 -08:00
timer_list.c timer_list: Print name of per-cpu wakeup device 2021-05-31 17:04:49 +02:00
timer.c timers: Fix warning condition in __run_timers() 2022-04-09 22:17:47 +02:00
vsyscall.c timekeeping, clocksource: Fix various typos in comments 2021-03-22 23:06:48 +01:00