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(parent: dc86cab) | patch
x86, perf_counter, bts: Fail if BTS is not available
authormarkus.t.metzger@intel.com <markus.t.metzger@intel.com>
Wed, 2 Sep 2009 14:04:46 +0000 (16:04 +0200)
committerIngo Molnar <mingo@elte.hu>
Fri, 4 Sep 2009 07:26:39 +0000 (09:26 +0200)
commit747b50aaf728987732e6ff3ba10aba4acc4e0277
treedd1b75f7d14b8bf7dff2519058516be69e70c356tree | snapshot (tar.gz zip)
parentdc86cabe4b242446ea9aa8492c727e1220817898commit | diff
x86, perf_counter, bts: Fail if BTS is not available

Reserve PERF_COUNT_HW_BRANCH_INSTRUCTIONS with sample_period ==
1 for BTS tracing and fail, if BTS is not available.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090902140612.943801000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/kernel/cpu/perf_counter.c diff | blob | blame | history