diff options
Diffstat (limited to 'kernel/rcu/refperf.c')
| -rw-r--r-- | kernel/rcu/refperf.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/rcu/refperf.c b/kernel/rcu/refperf.c index 2fd3ed1a0d0d..234bb0e84a8b 100644 --- a/kernel/rcu/refperf.c +++ b/kernel/rcu/refperf.c @@ -99,6 +99,7 @@ static atomic_t nreaders_exp; // Use to wait for all threads to start. static atomic_t n_init; +static atomic_t n_started; // Track which experiment is currently running. static int exp_idx; @@ -253,6 +254,9 @@ repeat: WARN_ON_ONCE(smp_processor_id() != me); WRITE_ONCE(rt->start_reader, 0); + if (!atomic_dec_return(&n_started)) + while (atomic_read_acquire(&n_started)) + cpu_relax(); VERBOSE_PERFOUT("ref_perf_reader %ld: experiment %d started", me, exp_idx); @@ -367,6 +371,7 @@ static int main_func(void *arg) reset_readers(); atomic_set(&nreaders_exp, nreaders); + atomic_set(&n_started, nreaders); exp_idx = exp; |