linux-kernel - Re: [RFC PATCH 00/15] Make MAX_ORDER adjustable as a kernel boot time parameter.

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Message-ID: <0d374eed-cc52-a656-b338-1156782bdf7e@suse.cz>
Date:   Fri, 6 Aug 2021 18:32:15 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Zi Yan <ziy@...dia.com>, David Hildenbrand <david@...hat.com>,
        linux-mm@...ck.org
Cc:     Matthew Wilcox <willy@...radead.org>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Michal Hocko <mhocko@...nel.org>,
        John Hubbard <jhubbard@...dia.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 00/15] Make MAX_ORDER adjustable as a kernel boot time
 parameter.

On 8/5/21 9:02 PM, Zi Yan wrote:
> From: Zi Yan <ziy@...dia.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?