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Commit 614b6780 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Arnaldo Carvalho de Melo
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perf events: Fix event inherit fallout of precalculated headers 



The precalculated header size is not updated when an event is inherited. That
results in bogus sample entries for all child events. Bug introduced in c320c7b7.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <alpine.LFD.2.00.1012031245220.2653@localhost6.localdomain6>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e4b546a3

kernel/perf_event.c

+5 −0
Original line number Diff line number Diff line
@@ -6098,6 +6098,11 @@ inherit_event(struct perf_event *parent_event, 
	child_event->ctx = child_ctx;

	child_event->overflow_handler = parent_event->overflow_handler;



	/*

	 * Precalculate sample_data sizes

	 */

	perf_event__header_size(child_event);



	/*

	 * Link it up in the child's context:

	 */