Re: [PATCH v4 0/7] Split a folio to any lower order folios

[David Hildenbrand]

On 13.02.24 22:55, Zi Yan wrote:
> From: Zi Yan <ziy@xxxxxxxxxx>
>
> Hi all,
>
> File folio supports any order and multi-size THP is upstreamed[1], so both
> file and anonymous folios can be >0 order. Currently, split_huge_page()
> only splits a huge page to order-0 pages, but splitting to orders higher than
> 0 is going to better utilize large folios. In addition, Large Block
> Sizes in XFS support would benefit from it[2]. This patchset adds support for
> splitting a large folio to any lower order folios and uses it during file
> folio truncate operations.
>
> For Patch 6, Hugh did not like my approach to minimize the number of
> folios for truncate[3]. I would like to get more feedback, especially
> from FS people, on it to decide whether to keep it or not.

I'm curious, would it make sense to exclude the "more" controversial 
parts (i.e., patch #6) for now, and focus on the XFS use case only?

--
Cheers,

David / dhildenb