Commit 748bf47a authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Test synchronous RCU grace periods at the end of rcu_init() 



This commit tests synchronize_rcu() and synchronize_rcu_expedited()
at the end of rcu_init(), in addition to the test already at the
beginning of that function.  These tests are run only in kernels built
with CONFIG_PROVE_RCU=y.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 3d1adf7a

kernel/rcu/tree.c

+2 −0
Original line number Diff line number Diff line
@@ -4849,6 +4849,8 @@ void __init rcu_init(void) 
	// Kick-start any polled grace periods that started early.

	if (!(per_cpu_ptr(&rcu_data, cpu)->mynode->exp_seq_poll_rq & 0x1))

		(void)start_poll_synchronize_rcu_expedited();



	rcu_test_sync_prims();

}



#include "tree_stall.h"

kernel/rcu/update.c

+1 −0
Original line number Diff line number Diff line
@@ -220,6 +220,7 @@ void rcu_test_sync_prims(void) 
{

	if (!IS_ENABLED(CONFIG_PROVE_RCU))

		return;

	pr_info("Running RCU synchronous self tests\n");

	synchronize_rcu();

	synchronize_rcu_expedited();

}