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rcutorture: Preempt RCU-preempt readers more vigorously

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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 <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2017-10-16 11:23:42 -07:00
parent cc1321c96f
commit e8302739aa
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/rcutorture.c
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@ -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. */
}