Peter Zijlstra f73e22ab45 perf: Fix races in computing the header sizes ... There are two races with the current code: - Another event can join the group and compute a larger header_size concurrently, if the smaller store wins we'll have an incorrect header_size set. - We compute the header_size after the event becomes active, therefore its possible to use the size before its computed. Remedy the first by moving the computation inside the ctx::mutex lock, and the second by placing it _before_ perf_install_in_context(). Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2015-09-18 09:20:26 +02:00
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callchain.c	Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2014-10-15 07:48:18 +02:00
core.c	perf: Fix races in computing the header sizes	2015-09-18 09:20:26 +02:00
hw_breakpoint.c	perf: Remove type specific target pointers	2015-03-23 10:58:04 +01:00
internal.h	perf: Fix AUX buffer refcounting	2015-07-06 14:08:30 +02:00
Makefile	ftrace: allow architectures to specify ftrace compile options	2015-01-29 09:19:19 +01:00
ring_buffer.c	perf/ring-buffer: Clarify the use of page::private for high-order AUX allocations	2015-08-12 11:43:20 +02:00
uprobes.c	uprobes: Fix the waitqueue_active() check in xol_free_insn_slot()	2015-07-31 10:38:07 +02:00