Re: [PATCH 00/11] x86, memblock: Allocate memory near kernel image before SRAT parsed.

[H. Peter Anvin]

Specifically there are a bunch of things which need to be below a certain address (which one varies.)

Tejun Heo <tj@xxxxxxxxxx> wrote:
>Hello, Wanpeng.
>
>On Fri, Sep 06, 2013 at 04:58:11PM +0800, Wanpeng Li wrote:
>> What's the root reason memblock alloc from high to low? To reduce 
>> fragmentation or ...
>
>Because low memory tends to be more precious, it's just easier to pack
>everything towards the top so that we don't have to worry about which
>zone to use for allocation and fallback logic.
>
>Thanks.

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