Re: [PATCH] perf/x86/intel: ignore CondChgd bit to avoid false NMI handling

Matt Fleming
2014-06-11T12:06:01Z

On Wed, 11 Jun, at 01:54:13PM, Peter Zijlstra wrote:
>
> Matt found in the MSR listing for GLOBAL_STATUS:
>
> 63 CondChg: status bits of this register has changed. If CPUID.0AH: EAX[7:0] > 0
>
> Which brings us to a grand total of 3 different names for this bit.

Right, I'm flinging emails around to get this fixed in the SDM, so that
the answer to,

Q: "How many kernel developers does it take to find the definition of
this bit?"

is less than 4.

--
Matt Fleming, Intel Open Source Technology Center