diff options
| -rw-r--r-- | kernel/trace/ring_buffer.c | 41 |
1 files changed, 15 insertions, 26 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 68388f876d43..6420cda62336 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -473,7 +473,7 @@ struct ring_buffer_per_cpu { int nr_pages_to_update; struct list_head new_pages; /* new pages to add */ struct work_struct update_pages_work; - struct completion update_completion; + struct completion update_done; }; struct ring_buffer { @@ -1058,7 +1058,7 @@ rb_allocate_cpu_buffer(struct ring_buffer *buffer, int nr_pages, int cpu) lockdep_set_class(&cpu_buffer->reader_lock, buffer->reader_lock_key); cpu_buffer->lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED; INIT_WORK(&cpu_buffer->update_pages_work, update_pages_handler); - init_completion(&cpu_buffer->update_completion); + init_completion(&cpu_buffer->update_done); bpage = kzalloc_node(ALIGN(sizeof(*bpage), cache_line_size()), GFP_KERNEL, cpu_to_node(cpu)); @@ -1461,7 +1461,7 @@ static void update_pages_handler(struct work_struct *work) struct ring_buffer_per_cpu *cpu_buffer = container_of(work, struct ring_buffer_per_cpu, update_pages_work); rb_update_pages(cpu_buffer); - complete(&cpu_buffer->update_completion); + complete(&cpu_buffer->update_done); } /** @@ -1534,39 +1534,29 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size, get_online_cpus(); /* * Fire off all the required work handlers - * Look out for offline CPUs - */ - for_each_buffer_cpu(buffer, cpu) { - cpu_buffer = buffer->buffers[cpu]; - if (!cpu_buffer->nr_pages_to_update || - !cpu_online(cpu)) - continue; - - schedule_work_on(cpu, &cpu_buffer->update_pages_work); - } - /* - * This loop is for the CPUs that are not online. - * We can't schedule anything on them, but it's not necessary + * We can't schedule on offline CPUs, but it's not necessary * since we can change their buffer sizes without any race. */ for_each_buffer_cpu(buffer, cpu) { cpu_buffer = buffer->buffers[cpu]; - if (!cpu_buffer->nr_pages_to_update || - cpu_online(cpu)) + if (!cpu_buffer->nr_pages_to_update) continue; - rb_update_pages(cpu_buffer); + if (cpu_online(cpu)) + schedule_work_on(cpu, + &cpu_buffer->update_pages_work); + else + rb_update_pages(cpu_buffer); } /* wait for all the updates to complete */ for_each_buffer_cpu(buffer, cpu) { cpu_buffer = buffer->buffers[cpu]; - if (!cpu_buffer->nr_pages_to_update || - !cpu_online(cpu)) + if (!cpu_buffer->nr_pages_to_update) continue; - wait_for_completion(&cpu_buffer->update_completion); - /* reset this value */ + if (cpu_online(cpu)) + wait_for_completion(&cpu_buffer->update_done); cpu_buffer->nr_pages_to_update = 0; } @@ -1593,13 +1583,12 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size, if (cpu_online(cpu_id)) { schedule_work_on(cpu_id, &cpu_buffer->update_pages_work); - wait_for_completion(&cpu_buffer->update_completion); + wait_for_completion(&cpu_buffer->update_done); } else rb_update_pages(cpu_buffer); - put_online_cpus(); - /* reset this value */ cpu_buffer->nr_pages_to_update = 0; + put_online_cpus(); } out: |
