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-rw-r--r--kernel/events/core.c6
-rw-r--r--kernel/events/ring_buffer.c16
2 files changed, 13 insertions, 9 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 5e70f62752a2..e4aee519572d 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3569,8 +3569,10 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
if (vma->vm_flags & VM_WRITE)
flags |= RING_BUFFER_WRITABLE;
- rb = rb_alloc(nr_pages, event->attr.wakeup_watermark,
- event->cpu, flags);
+ rb = rb_alloc(nr_pages,
+ event->attr.watermark ? event->attr.wakeup_watermark : 0,
+ event->cpu, flags);
+
if (!rb) {
ret = -ENOMEM;
goto unlock;
diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c
index fde52595d8f7..fc2701c99207 100644
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -199,13 +199,15 @@ void perf_output_end(struct perf_output_handle *handle)
struct perf_event *event = handle->event;
struct ring_buffer *rb = handle->rb;
- int wakeup_events = event->attr.wakeup_events;
-
- if (handle->sample && wakeup_events) {
- int events = local_inc_return(&rb->events);
- if (events >= wakeup_events) {
- local_sub(wakeup_events, &rb->events);
- local_inc(&rb->wakeup);
+ if (handle->sample && !event->attr.watermark) {
+ int wakeup_events = event->attr.wakeup_events;
+
+ if (wakeup_events) {
+ int events = local_inc_return(&rb->events);
+ if (events >= wakeup_events) {
+ local_sub(wakeup_events, &rb->events);
+ local_inc(&rb->wakeup);
+ }
}
}