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From: Andy Lutomirski <>
To: X86 ML <>
Cc: "" <>,
	Borislav Petkov <>,
	Vince Weaver <>,
	Andy Lutomirski <>
Subject: [PATCH 0/2] x86/perf: A CR4.PCE bugfix and clarification
Date: Thu, 16 Mar 2017 12:59:38 -0700
Message-ID: <> (raw)

Hi all-

Vince found a bug in our CR4.PCE handling.  While investigating, I
found what looked like another bug but actually wasn't.

Here's a fix for the bug (cc'd to stable) and a comment and lockdep
annotation for why the other non-bug isn't actually a bug.

Andy Lutomirski (2):
  x86/perf: Fix CR4.PCE propagation to use active_mm instead of mm
  x86/perf: Clarify why x86_pmu_event_mapped() isn't racy

 arch/x86/events/core.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)


             reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-16 19:59 Andy Lutomirski [this message]
2017-03-16 19:59 ` [PATCH 1/2] x86/perf: Fix CR4.PCE propagation to use active_mm instead of mm Andy Lutomirski
2017-03-17 10:16   ` [tip:perf/urgent] " tip-bot for Andy Lutomirski
2017-03-16 19:59 ` [PATCH 2/2] x86/perf: Clarify why x86_pmu_event_mapped() isn't racy Andy Lutomirski
2017-03-17 10:17   ` [tip:perf/urgent] " tip-bot for Andy Lutomirski

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