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Date:   Thu, 19 Oct 2023 11:12:24 +0800
From:   Muchun Song <>
To:     Mike Kravetz <>
Cc:     Linux-MM <>, LKML <>,
        Muchun Song <>,
        Joao Martins <>,
        Konrad Dybcio <>,
        Oscar Salvador <>,
        David Hildenbrand <>,
        Miaohe Lin <>,
        David Rientjes <>,
        Anshuman Khandual <>,
        Naoya Horiguchi <>,
        Barry Song <>, Michal Hocko <>,
        Matthew Wilcox <>,
        Xiongchun Duan <>,
        Sergey Senozhatsky <>,
        Usama Arif <>,
        Andrew Morton <>
Subject: Re: [PATCH v8 3/8] hugetlb: perform vmemmap optimization on a list of

> On Oct 19, 2023, at 10:31, Mike Kravetz <> wrote:
> When adding hugetlb pages to the pool, we first create a list of the
> allocated pages before adding to the pool.  Pass this list of pages to a
> new routine hugetlb_vmemmap_optimize_folios() for vmemmap optimization.
> Due to significant differences in vmemmmap initialization for bootmem
> allocated hugetlb pages, a new routine prep_and_add_bootmem_folios
> is created.
> We also modify the routine vmemmap_should_optimize() to check for pages
> that are already optimized.  There are code paths that might request
> vmemmap optimization twice and we want to make sure this is not
> attempted.
> Signed-off-by: Mike Kravetz <>

Reviewed-by: Muchun Song <>


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