Loading kernel/cpu.c +15 −0 Original line number Diff line number Diff line Loading @@ -375,6 +375,21 @@ static int _cpu_down(unsigned int cpu, int tasks_frozen) goto out_release; } /* * By now we've cleared cpu_active_mask, wait for all preempt-disabled * and RCU users of this state to go away such that all new such users * will observe it. * * For CONFIG_PREEMPT we have preemptible RCU and its sync_rcu() might * not imply sync_sched(), so wait for both. * * Do sync before park smpboot threads to take care the rcu boost case. */ if (IS_ENABLED(CONFIG_PREEMPT)) synchronize_rcu_mult(call_rcu, call_rcu_sched); else synchronize_rcu(); smpboot_park_threads(cpu); /* Loading Loading
kernel/cpu.c +15 −0 Original line number Diff line number Diff line Loading @@ -375,6 +375,21 @@ static int _cpu_down(unsigned int cpu, int tasks_frozen) goto out_release; } /* * By now we've cleared cpu_active_mask, wait for all preempt-disabled * and RCU users of this state to go away such that all new such users * will observe it. * * For CONFIG_PREEMPT we have preemptible RCU and its sync_rcu() might * not imply sync_sched(), so wait for both. * * Do sync before park smpboot threads to take care the rcu boost case. */ if (IS_ENABLED(CONFIG_PREEMPT)) synchronize_rcu_mult(call_rcu, call_rcu_sched); else synchronize_rcu(); smpboot_park_threads(cpu); /* Loading
