perf_events: Fix races and clean up perf_event and perf_mmap_data interaction

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commit ac9721f3f5 upstream.

In order to move toward separate buffer objects, rework the whole
perf_mmap_data construct to be a more self-sufficient entity, one
with its own lifetime rules.

This greatly sanitizes the whole output redirection code, which
was riddled with bugs and races.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

...

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Peter Zijlstra 2010-05-27 12:54:41 +02:00 • committed by Greg Kroah-Hartman

parent ca2455ec06

commit 5842e8e202

2 changed files with 129 additions and 93 deletions

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5

include/linux/perf_event.h

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217

kernel/perf_event.c

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