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locktorture: Teach about lock debugging 

Regular locks are very different than locks with debugging. For instance
for mutexes, debugging forces to only take the slowpaths. As such, the
locktorture module should take this into account when printing related
information -- specifically when printing user passed parameters, it seems
the right place for such info.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Davidlohr Bueso 2014-09-11 20:40:19 -07:00 committed by Paul E. McKenney
parent 42ddc75ddd
commit f095bfc0ea
1 changed files with 13 additions and 2 deletions
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15
kernel/locking/locktorture.c
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@ -64,6 +64,7 @@ torture_param(int, stutter, 5, "Number of jiffies to run/halt test, 0=disable");
torture_param(bool, verbose, true,
"Enable verbose debugging printk()s");
static bool debug_lock = false;
static char *torture_type = "spin_lock";
module_param(torture_type, charp, 0444);
MODULE_PARM_DESC(torture_type,
@ -349,8 +350,9 @@ lock_torture_print_module_parms(struct lock_torture_ops *cur_ops,
const char *tag)
{
pr_alert("%s" TORTURE_FLAG
"--- %s: nwriters_stress=%d stat_interval=%d verbose=%d shuffle_interval=%d stutter=%d shutdown_secs=%d onoff_interval=%d onoff_holdoff=%d\n",
torture_type, tag, nrealwriters_stress, stat_interval, verbose,
"--- %s%s: nwriters_stress=%d stat_interval=%d verbose=%d shuffle_interval=%d stutter=%d shutdown_secs=%d onoff_interval=%d onoff_holdoff=%d\n",
torture_type, tag, debug_lock ? " [debug]": "",
nrealwriters_stress, stat_interval, verbose,
shuffle_interval, stutter, shutdown_secs,
onoff_interval, onoff_holdoff);
}
@ -418,6 +420,15 @@ static int __init lock_torture_init(void)
nrealwriters_stress = nwriters_stress;
else
nrealwriters_stress = 2 * num_online_cpus();
#ifdef CONFIG_DEBUG_MUTEXES
if (strncmp(torture_type, "mutex", 5) == 0)
debug_lock = true;
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
if (strncmp(torture_type, "spin", 4) == 0)
debug_lock = true;
#endif
lock_torture_print_module_parms(cur_ops, "Start of test");
/* Initialize the statistics so that each run gets its own numbers. */