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Date:   Tue, 3 Jul 2018 09:28:35 +0200
From:   Michal Hocko <mhocko@kernel.org>
To:     Jia He <hejianet@gmail.com>
Cc:     Russell King <linux@armlinux.org.uk>,
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Subject: Re: [PATCH v9 0/6] optimize memblock_next_valid_pfn and
 early_pfn_valid on arm and arm64
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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.
-- 
Michal Hocko
SUSE Labs