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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-08 14:20:16 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-08 15:56:42 +0100 |
| commit | 87b9cf4623ad4e5fc009e48c020593dffd5d3793 (patch) | |
| tree | bd49f47b3fee4f4dc956e7db303fb1c20d53eee3 /init | |
| parent | 241771ef016b5c0c83cd7a4372a74321c973c1e6 (diff) | |
| download | linux-2.6-87b9cf4623ad4e5fc009e48c020593dffd5d3793.tar.gz linux-2.6-87b9cf4623ad4e5fc009e48c020593dffd5d3793.tar.xz | |
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>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions