Re: [PATCH] replace free hugepage folios after migration

[SeongJae Park]

Hello,

On Wed, 18 Dec 2024 14:33:08 +0800 yangge1116@xxxxxxx wrote:

[...]
> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
> index ae4fe86..7d36ac8 100644
> --- a/include/linux/hugetlb.h
> +++ b/include/linux/hugetlb.h
> @@ -681,6 +681,7 @@ struct huge_bootmem_page {
>  };
>  
>  int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list);
> +int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn);
>  struct folio *alloc_hugetlb_folio(struct vm_area_struct *vma,
>  				unsigned long addr, int avoid_reserve);
>  struct folio *alloc_hugetlb_folio_nodemask(struct hstate *h, int preferred_nid,
> @@ -1059,6 +1060,11 @@ static inline int isolate_or_dissolve_huge_page(struct page *page,
>  	return -ENOMEM;
>  }
>  
> +int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
> +{
> +	return 0;
> +}
> +

I think this should be static inline.  Otherwise, build fails when
CONFIG_HUGETLB_PAGE is unset.  Since this is already merged into mm-unstable
and the problem and fix seems straigthforward, I directly sent my fix:
https://lore.kernel.org/20241219183753.62922-1-sj@xxxxxxxxxx


Thanks,
SJ

[...]