diff options
Diffstat (limited to 'kernel/cpu.c')
| -rw-r--r-- | kernel/cpu.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 973d034..deff2e6 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -306,7 +306,6 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) __func__, cpu); goto out_release; } - smpboot_park_threads(cpu); /* * By now we've cleared cpu_active_mask, wait for all preempt-disabled @@ -315,12 +314,16 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) * * For CONFIG_PREEMPT we have preemptible RCU and its sync_rcu() might * not imply sync_sched(), so explicitly call both. + * + * Do sync before park smpboot threads to take care the rcu boost case. */ #ifdef CONFIG_PREEMPT synchronize_sched(); #endif synchronize_rcu(); + smpboot_park_threads(cpu); + /* * So now all preempt/rcu users must observe !cpu_active(). */ |
