Re: [PATCH v5 5/5] mm: page_alloc: reduce unnecessary binary search in early_pfn_valid()

[Jia He <hejianet@xxxxxxxxx>]

On 4/2/2018 3:00 PM, Ard Biesheuvel Wrote:
> How much does it improve the performance? And in which cases?
>
> I guess it improves boot time on systems with physical address spaces
> that are sparsely populated with DRAM, but you really have to quantify
> this if you want other people to care.
Yes, I write the performance in patch 0/5. I will write it in the patch 
description later.

--
Cheers,
Jia