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Merge branches 'doc.2020.02.27a', 'fixes.2020.03.21a', 'kfree_rcu.2020.02.20a', 'locktorture.2020.02.20a', 'ovld.2020.02.20a', 'rcu-tasks.2020.02.20a', 'srcu.2020.02.20a' and 'torture.2020.02.20a' into HEAD

Browse Source 
doc.2020.02.27a: Documentation updates.
fixes.2020.03.21a: Miscellaneous fixes.
kfree_rcu.2020.02.20a: Updates to kfree_rcu().
locktorture.2020.02.20a: Lock torture-test updates.
ovld.2020.02.20a: Updates to callback-overload handling.
rcu-tasks.2020.02.20a: RCU-tasks updates.
srcu.2020.02.20a: SRCU updates.
torture.2020.02.20a: Torture-test updates.
This commit is contained in:
Paul E. McKenney
2020-03-21 17:15:11 -07:00
parent 8149b5cbfa 127e29815b 613707929b 28e09a2e48 b692dc4adf 90ba11ba99 710426068d a144935cea
commit aa93ec620b
29 changed files with 644 additions and 203 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
kernel/locking/locktorture.c
View File

@@ -618,7 +618,7 @@ static struct lock_torture_ops percpu_rwsem_lock_ops = {
static int lock_torture_writer(void *arg)
{
struct lock_stress_stats *lwsp = arg;
static DEFINE_TORTURE_RANDOM(rand);
DEFINE_TORTURE_RANDOM(rand);
VERBOSE_TOROUT_STRING("lock_torture_writer task started");
set_user_nice(current, MAX_NICE);
@@ -655,7 +655,7 @@ static int lock_torture_writer(void *arg)
static int lock_torture_reader(void *arg)
{
struct lock_stress_stats *lrsp = arg;
static DEFINE_TORTURE_RANDOM(rand);
DEFINE_TORTURE_RANDOM(rand);
VERBOSE_TOROUT_STRING("lock_torture_reader task started");
set_user_nice(current, MAX_NICE);
@@ -696,15 +696,16 @@ static void __torture_print_stats(char *page,
if (statp[i].n_lock_fail)
fail = true;
sum += statp[i].n_lock_acquired;
if (max < statp[i].n_lock_fail)
max = statp[i].n_lock_fail;
if (min > statp[i].n_lock_fail)
min = statp[i].n_lock_fail;
if (max < statp[i].n_lock_acquired)
max = statp[i].n_lock_acquired;
if (min > statp[i].n_lock_acquired)
min = statp[i].n_lock_acquired;
}
page += sprintf(page,
"%s: Total: %lld Max/Min: %ld/%ld %s Fail: %d %s\n",
write ? "Writes" : "Reads ",
sum, max, min, max / 2 > min ? "???" : "",
sum, max, min,
!onoff_interval && max / 2 > min ? "???" : "",
fail, fail ? "!!!" : "");
if (fail)
atomic_inc(&cxt.n_lock_torture_errors);

2
kernel/locking/rtmutex.c
View File

@@ -57,7 +57,7 @@ rt_mutex_set_owner(struct rt_mutex *lock, struct task_struct *owner)
if (rt_mutex_has_waiters(lock))
val |= RT_MUTEX_HAS_WAITERS;
lock->owner = (struct task_struct *)val;
WRITE_ONCE(lock->owner, (struct task_struct *)val);
}
static inline void clear_rt_mutex_waiters(struct rt_mutex *lock)