perf, x86: Catch spurious interrupts after disabling counters
Some cpus still deliver spurious interrupts after disabling a counter. This caused 'undelivered NMI' messages. This patch fixes this. Introduced by: 4177c42a: perf, x86: Try to handle unknown nmis with an enabled PMU Reported-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NRobert Richter <robert.richter@amd.com> Cc: Don Zickus <dzickus@redhat.com> Cc: gorcunov@gmail.com <gorcunov@gmail.com> Cc: fweisbec@gmail.com <fweisbec@gmail.com> Cc: ying.huang@intel.com <ying.huang@intel.com> Cc: ming.m.lin@intel.com <ming.m.lin@intel.com> Cc: yinghai@kernel.org <yinghai@kernel.org> Cc: andi@firstfloor.org <andi@firstfloor.org> Cc: eranian@google.com <eranian@google.com> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100915162034.GO13563@erda.amd.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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