From: Paul E. McKenney Date: Mon, 16 Oct 2017 18:23:42 +0000 (-0700) Subject: rcutorture: Preempt RCU-preempt readers more vigorously X-Git-Tag: v4.16-rc1~169^2^2^5~15 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e8302739aa2204d52dacf9e9619cb6e755fa997a;p=linux.git rcutorture: Preempt RCU-preempt readers more vigorously This commit attempts to make a very rare rcutorture failure happen more often by increasing the fraction of RCU-preempt read-side critical sections that are preempted. Signed-off-by: Paul E. McKenney --- diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index e7d3cce84214..1074ecc3f72f 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -316,7 +316,7 @@ static void rcu_read_delay(struct torture_random_state *rrsp) if (!(torture_random(rrsp) % (nrealreaders * 2 * shortdelay_us))) udelay(shortdelay_us); if (!preempt_count() && - !(torture_random(rrsp) % (nrealreaders * 20000))) + !(torture_random(rrsp) % (nrealreaders * 500))) torture_preempt_schedule(); /* QS only if preemptible. */ }