Re: [PATCH v9 0/6] optimize memblock_next_valid_pfn and early_pfn_valid on arm and arm64
From: Michal Hocko
Date: Tue Jul 03 2018 - 03:28:44 EST
On Tue 03-07-18 10:11:11, Jia He wrote:
> On 7/2/2018 7:40 PM, Michal Hocko Wrote:
> > So this is 13ms saving when booting 96G machine. Is this really worth
> > the additional code? Are there any other benefits?
> Sorry, Michal
> I missed one thing.
> This 13ms optimization is merely the result of my patch 3~6
> Patch 1 is originated by Paul Burton in commit b92df1de5d289.
> In its description,
> James said "I have tested this patch on a virtual model of a Samurai CPU
> with a sparse memory map. The kernel boot time drops from 109 to
> 62 seconds. "
Those numbers should be in the changelog.