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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-11-25 13:00:04 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-01-06 17:17:21 -0800 |
| commit | 8a67a20bf257ca378d6e5588fbe4382966395ac8 (patch) | |
| tree | 753181be97fe8ba219ee3ece337ad440648e27e2 /kernel/torture.c | |
| parent | 414c116e016584137118067f506125f6ace6128c (diff) | |
| download | linux-8a67a20bf257ca378d6e5588fbe4382966395ac8.tar.bz2 | |
torture: Throttle VERBOSE_TOROUT_*() output
This commit adds kernel boot parameters torture.verbose_sleep_frequency
and torture.verbose_sleep_duration, which allow VERBOSE_TOROUT_*() output
to be throttled with periodic sleeps on large systems.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/torture.c')
| -rw-r--r-- | kernel/torture.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/torture.c b/kernel/torture.c index 7ad5c9681580..93eeeb2b3d88 100644 --- a/kernel/torture.c +++ b/kernel/torture.c @@ -48,6 +48,12 @@ module_param(disable_onoff_at_boot, bool, 0444); static bool ftrace_dump_at_shutdown; module_param(ftrace_dump_at_shutdown, bool, 0444); +static int verbose_sleep_frequency; +module_param(verbose_sleep_frequency, int, 0444); + +static int verbose_sleep_duration = 1; +module_param(verbose_sleep_duration, int, 0444); + static char *torture_type; static int verbose; @@ -58,6 +64,20 @@ static int verbose; static int fullstop = FULLSTOP_RMMOD; static DEFINE_MUTEX(fullstop_mutex); +static atomic_t verbose_sleep_counter; + +/* + * Sleep if needed from VERBOSE_TOROUT*(). + */ +void verbose_torout_sleep(void) +{ + if (verbose_sleep_frequency > 0 && + verbose_sleep_duration > 0 && + !(atomic_inc_return(&verbose_sleep_counter) % verbose_sleep_frequency)) + schedule_timeout_uninterruptible(verbose_sleep_duration); +} +EXPORT_SYMBOL_GPL(verbose_torout_sleep); + /* * Schedule a high-resolution-timer sleep in nanoseconds, with a 32-bit * nanosecond random fuzz. This function and its friends desynchronize |