Re: [tip:perfcounters/core] perf_counter: x86: Fix call-chain support to use NMI-safe methods

Peter Zijlstra
2009-06-15T18:52:45Z

On Mon, 2009-06-15 at 14:48 -0400, Mathieu Desnoyers wrote:
> we should not care that much about the performance hit of
> saving/restoring the cr2 register at each nmi entry/exit.

But we do, perf counters very much cares about nmi performance.