Re: [PATCH v3 7/7] x86/tlb: add tlb_flushall_factor into sysfs foruser change

[H. Peter Anvin]

On 05/08/2012 08:11 AM, Peter Zijlstra wrote:
> On Tue, 2012-05-08 at 22:03 +0800, Alex Shi wrote:
>> kernel will replace cr3 rewrite with invlpg when
>> 	tlb flush entries <= 1/tlb_flushall_factor
>> if tlb_flushall_factor is 0, kernel won't do this replace.
>>
>> User can modify its value according to specific applications.
> 
> Yay!, another useless config knob :-(
> 

I think this one is mostly for benchmarking new silicon to find out the
proper value, I'm guessing?

	-hpa

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