linux-kernel - [PATCH 0/2] perf, bts: Make BTS exclusive again

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Message-Id: <20160920154811.3255-1-alexander.shishkin@linux.intel.com>
Date:   Tue, 20 Sep 2016 18:48:09 +0300
From:   Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:     Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        vince@...ter.net, eranian@...gle.com,
        Arnaldo Carvalho de Melo <acme@...radead.org>,
        tglx@...utronix.de,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [PATCH 0/2] perf, bts: Make BTS exclusive again

Hi Peter,

While looking at something else I noticed that the exclusive event
filter only allows one such event per context, whereas it should allow
one such event from each PMU that has PERF_PMU_CAP_EXCLUSIVE. At the
same time, intel_bts PMU doesn't even have this capability set (which
is why on systems that allow coexistance of PT and BTS it still works,
see ccbebba4c6 for more context).

Alexander Shishkin (2):
  perf/x86/intel/bts: Make it an exclusive PMU
  perf: Limit matching exclusive events to one PMU

 arch/x86/events/intel/bts.c | 3 ++-
 kernel/events/core.c        | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

-- 
2.9.3