dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

torture: Throttle VERBOSE_TOROUT_*() output

Browse Source 
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>
This commit is contained in:
Paul E. McKenney
2021-01-06 17:17:21 -08:00
parent 414c116e01
commit 8a67a20bf2
3 changed files with 41 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/torture.c
+20
View File
@@ -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