On 8/5/21 9:02 PM, Zi Yan wrote:

From: Zi Yan <ziy@nvidia.com>

Hi all,

This patchset add support for kernel boot time adjustable MAX_ORDER, so that
user can change the largest size of pages obtained from buddy allocator. It also
removes the restriction on MAX_ORDER based on SECTION_SIZE_BITS, so that
buddy allocator can merge PFNs across memory sections when SPARSEMEM_VMEMMAP is
set. It is on top of v5.14-rc4-mmotm-2021-08-02-18-51.

Motivation
===

This enables kernel to allocate 1GB pages and is necessary for my ongoing work
on adding support for 1GB PUD THP[1]. This is also the conclusion I came up with
after some discussion with David Hildenbrand on what methods should be used for
allocating gigantic pages[2], since other approaches like using CMA allocator or
alloc_contig_pages() are regarded as suboptimal.

I see references [1] [2] etc but no list of links at the end, did you
forgot to include?