Commit 614b6780 authored Dec 03, 2010 by Thomas Gleixner Committed by Arnaldo Carvalho de Melo Dec 04, 2010

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: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo 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:
		*/

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