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-rw-r--r--kernel/rcu/tree.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 233165da782f..8cf7304b2867 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -162,11 +162,14 @@ static void invoke_rcu_callbacks(struct rcu_state *rsp, struct rcu_data *rdp);
162static int kthread_prio = CONFIG_RCU_KTHREAD_PRIO; 162static int kthread_prio = CONFIG_RCU_KTHREAD_PRIO;
163module_param(kthread_prio, int, 0644); 163module_param(kthread_prio, int, 0644);
164 164
165/* Delay in jiffies for grace-period initialization delays. */ 165/* Delay in jiffies for grace-period initialization delays, debug only. */
166static int gp_init_delay = IS_ENABLED(CONFIG_RCU_TORTURE_TEST_SLOW_INIT) 166#ifdef CONFIG_RCU_TORTURE_TEST_SLOW_INIT
167 ? CONFIG_RCU_TORTURE_TEST_SLOW_INIT_DELAY 167static int gp_init_delay = CONFIG_RCU_TORTURE_TEST_SLOW_INIT_DELAY;
168 : 0;
169module_param(gp_init_delay, int, 0644); 168module_param(gp_init_delay, int, 0644);
169#else /* #ifdef CONFIG_RCU_TORTURE_TEST_SLOW_INIT */
170static const int gp_init_delay;
171#endif /* #else #ifdef CONFIG_RCU_TORTURE_TEST_SLOW_INIT */
172#define PER_RCU_NODE_PERIOD 10 /* Number of grace periods between delays. */
170 173
171/* 174/*
172 * Track the rcutorture test sequence number and the update version 175 * Track the rcutorture test sequence number and the update version
@@ -1843,9 +1846,8 @@ static int rcu_gp_init(struct rcu_state *rsp)
1843 raw_spin_unlock_irq(&rnp->lock); 1846 raw_spin_unlock_irq(&rnp->lock);
1844 cond_resched_rcu_qs(); 1847 cond_resched_rcu_qs();
1845 ACCESS_ONCE(rsp->gp_activity) = jiffies; 1848 ACCESS_ONCE(rsp->gp_activity) = jiffies;
1846 if (IS_ENABLED(CONFIG_RCU_TORTURE_TEST_SLOW_INIT) && 1849 if (gp_init_delay > 0 &&
1847 gp_init_delay > 0 && 1850 !(rsp->gpnum % (rcu_num_nodes * PER_RCU_NODE_PERIOD)))
1848 !(rsp->gpnum % (rcu_num_nodes * 10)))
1849 schedule_timeout_uninterruptible(gp_init_delay); 1851 schedule_timeout_uninterruptible(gp_init_delay);
1850 } 1852 }
1851 1853