Commit f733c6b5 authored Oct 04, 2019 by Alexander Shishkin Committed by Ingo Molnar Oct 07, 2019

perf/core: Fix inheritance of aux_output groups



Commit:

  ab43762e ("perf: Allow normal events to output AUX data")

forgets to configure aux_output relation in the inherited groups, which
results in child PEBS events forever failing to schedule.

Fix this by setting up the AUX output link in the inheritance path.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191004125729.32397-1-alexander.shishkin@linux.intel.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent a4cf7b39

kernel/events/core.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -11862,6 +11862,10 @@ static int inherit_group(struct perf_event *parent_event,
		child, leader, child_ctx);
		if (IS_ERR(child_ctr))
		return PTR_ERR(child_ctr);

		if (sub->aux_event == parent_event &&
		!perf_get_aux_event(child_ctr, leader))
		return -EINVAL;
		}
		return 0;
		}

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