diff options
Diffstat (limited to 'kernel/trace/ring_buffer.c')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index a53f1bbc546b..4232d58a110e 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -1681,28 +1681,22 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size, * We can't schedule on offline CPUs, but it's not necessary * since we can change their buffer sizes without any race. */ + migrate_disable(); for_each_buffer_cpu(buffer, cpu) { cpu_buffer = buffer->buffers[cpu]; if (!cpu_buffer->nr_pages_to_update) continue; /* The update must run on the CPU that is being updated. */ - preempt_disable(); if (cpu == smp_processor_id() || !cpu_online(cpu)) { rb_update_pages(cpu_buffer); cpu_buffer->nr_pages_to_update = 0; } else { - /* - * Can not disable preemption for schedule_work_on() - * on PREEMPT_RT. - */ - preempt_enable(); schedule_work_on(cpu, &cpu_buffer->update_pages_work); - preempt_disable(); } - preempt_enable(); } + migrate_enable(); /* wait for all the updates to complete */ for_each_buffer_cpu(buffer, cpu) { @@ -1739,22 +1733,16 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size, get_online_cpus(); - preempt_disable(); + migrate_disable(); /* The update must run on the CPU that is being updated. */ if (cpu_id == smp_processor_id() || !cpu_online(cpu_id)) rb_update_pages(cpu_buffer); else { - /* - * Can not disable preemption for schedule_work_on() - * on PREEMPT_RT. - */ - preempt_enable(); schedule_work_on(cpu_id, &cpu_buffer->update_pages_work); wait_for_completion(&cpu_buffer->update_done); - preempt_disable(); } - preempt_enable(); + migrate_enable(); cpu_buffer->nr_pages_to_update = 0; put_online_cpus(); |