The rcu_torture_writer() polling currently uses timeouts ranging from zero to 16 milliseconds to wait for the polled grace period to end. This works, but it would be better to have a higher probability of exercising races with the code that cleans up after a grace period. This commit therefore switches from these millisecond-scale timeouts to timeouts ranging from zero to 128 microseconds, and with a full microsecond's worth of timeout fuzz. Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx> --- kernel/rcu/rcutorture.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 0bc6fc5822153..6067f2740247d 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1561,8 +1561,8 @@ rcu_torture_writer(void *arg) break; } WARN_ON_ONCE(ulo_size > 0 && i >= ulo_size); - torture_hrtimeout_jiffies(torture_random(&rand) % 16, - &rand); + torture_hrtimeout_us(torture_random(&rand) % 128, 1000, + &rand); } rcu_torture_pipe_update(old_rp); break; @@ -1582,8 +1582,8 @@ rcu_torture_writer(void *arg) break; } WARN_ON_ONCE(rgo_size > 0 && i >= rgo_size); - torture_hrtimeout_jiffies(torture_random(&rand) % 16, - &rand); + torture_hrtimeout_us(torture_random(&rand) % 128, 1000, + &rand); } rcu_torture_pipe_update(old_rp); break; @@ -1592,8 +1592,8 @@ rcu_torture_writer(void *arg) gp_snap = cur_ops->start_gp_poll_exp(); rcu_torture_writer_state = RTWS_POLL_WAIT_EXP; while (!cur_ops->poll_gp_state_exp(gp_snap)) - torture_hrtimeout_jiffies(torture_random(&rand) % 16, - &rand); + torture_hrtimeout_us(torture_random(&rand) % 128, 1000, + &rand); rcu_torture_pipe_update(old_rp); break; case RTWS_POLL_GET_EXP_FULL: @@ -1601,8 +1601,8 @@ rcu_torture_writer(void *arg) cur_ops->start_gp_poll_exp_full(&gp_snap_full); rcu_torture_writer_state = RTWS_POLL_WAIT_EXP_FULL; while (!cur_ops->poll_gp_state_full(&gp_snap_full)) - torture_hrtimeout_jiffies(torture_random(&rand) % 16, - &rand); + torture_hrtimeout_us(torture_random(&rand) % 128, 1000, + &rand); rcu_torture_pipe_update(old_rp); break; case RTWS_SYNC: -- 2.40.1
