Re: [RFC PATCH 0/1] Buddy allocator like folio split

[Zi Yan <ziy@nvidia.com>]

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On 9 Oct 2024, at 5:54, Kirill A. Shutemov wrote:

> On Tue, Oct 08, 2024 at 06:37:47PM -0400, Zi Yan wrote:
>>  mm/huge_memory.c | 648 ++++++++++++++++++++++++++++++++++++++++++++++-
>>  1 file changed, 647 insertions(+), 1 deletion(-)
>
> The idea is sane, but I think it would require a lot more ground work
> before getting it upstream. I don't think we can afford two parallel split
> implementations. folio_split() and split_huge_page*() should share the same
> implementation internally. Otherwise it is going to be pain to maintain
> them in-sync.

The goal is to replace split_huge_page*() with folio_split(). But for now,
split_huge_page*() is still needed for swap cached anon folios and shmem.
And this might take quite a while until we have a better swap system.

I think it is possible to use the same internal implementation
for both folio_split() and split_huge_page*(). I can give it a try in
the next version.


--
Best Regards,
Yan, Zi

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