In order to collect AUX data from an inherited event, we can redirect its
output to parent's ring buffer if possible (they must be cpu affine). This
patch adds set_output() to the inheritance path.
Signed-off-by: Alexander Shishkin <alexander.shish...@linux.intel.com>
---
kernel/events/core.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 361a45eee2..55cd524564 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7859,6 +7859,12 @@ inherit_event(struct perf_event *parent_event,
= parent_event->overflow_handler_context;
/*
+ * Direct child's output to parent's ring buffer (if any)
+ */
+ if (parent_event->cpu != -1)
+ (void)perf_event_set_output(child_event, parent_event);
+
+ /*
* Precalculate sample_data sizes
*/
perf_event__header_size(child_event);
--
2.1.0.rc1
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