Re: [PATCH v2 1/2] mm: alloc_pages_bulk_noprof: drop page_list argument

[David Hildenbrand]

On 23.12.24 23:00, Luiz Capitulino wrote:
> The commit 387ba26fb1cb ("mm/page_alloc: add a bulk page allocator") added
> __alloc_pages_bulk() along with the page_list argument. The next
> commit 0f87d9d30f21 ("mm/page_alloc: add an array-based interface to the
> bulk page allocator") added the array-based argument. As it turns out, the
> page_list argument has no users in the current tree (if it ever had any).
> Dropping it allows for a slight simplification and eliminates some
> unnecessary checks, now that page_array is required.
>
> Also, note that the removal of the page_list argument was proposed before
> in the thread below, where Matthew Wilcox mentions that:
>
>    """
>    Iterating a linked list is _expensive_.  It is about 10x quicker to
>    iterate an array than a linked list.
>    """
>    (https://lore.kernel.org/linux-mm/20231025093254.xvomlctwhcuerzky@xxxxxxxxxxxxxxxxxxx)
>
> Signed-off-by: Luiz Capitulino <luizcap@xxxxxxxxxx>
> ---

Acked-by: David Hildenbrand <david@xxxxxxxxxx>

Thanks!

--
Cheers,

David / dhildenb