| commit | 87b9cf4623ad4e5fc009e48c020593dffd5d3793 | [log] [tgz] |
|---|---|---|
| author | Ingo Molnar <mingo@elte.hu> | Mon Dec 08 14:20:16 2008 +0100 |
| committer | Ingo Molnar <mingo@elte.hu> | Mon Dec 08 15:56:42 2008 +0100 |
| tree | bd49f47b3fee4f4dc956e7db303fb1c20d53eee3 | |
| parent | 241771ef016b5c0c83cd7a4372a74321c973c1e6 [diff] |
x86, perfcounters: read out MSR_CORE_PERF_GLOBAL_STATUS with counters disabled Impact: make perfcounter NMI and IRQ sequence more robust Make __smp_perf_counter_interrupt() a bit more conservative: first disable all counters, then read out the status. Most invocations are because there are real events, so there's no performance impact. Code flow gets a bit simpler as well this way. Signed-off-by: Ingo Molnar <mingo@elte.hu>