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authorKan Liang <kan.liang@intel.com>2016-08-11 07:30:20 -0700
committerIngo Molnar <mingo@kernel.org>2016-08-12 08:35:04 +0200
commit10e9e7bd598f9a66a11a22514c68c13c41fc821b (patch)
tree7f90d252acec7c7805b0dcbb3923961ddb22f306 /kernel/irq/debug.h
parent68187872c76a96ed4db7bfb064272591f02e208b (diff)
perf/x86/intel/uncore: Fix uncore num_counters
Some uncore boxes' num_counters value for Haswell server and Broadwell server are not correct (too large, off by one). This issue was found by comparing the code with the document. Although there is no bug report from users yet, accessing non-existent counters is dangerous and the behavior is undefined: it may cause miscounting or even crashes. This patch makes them consistent with the uncore document. Reported-by: Lukasz Odzioba <lukasz.odzioba@intel.com> Signed-off-by: Kan Liang <kan.liang@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/1470925820-59847-1-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/irq/debug.h')
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