Re: [PATCH v6 05/11] mm: split a folio in minimum folio order chunks

[Hannes Reinecke]

On 5/29/24 15:45, Pankaj Raghav (Samsung) wrote:
> From: Luis Chamberlain <mcgrof@xxxxxxxxxx>
>
> split_folio() and split_folio_to_list() assume order 0, to support
> minorder we must expand these to check the folio mapping order and use
> that.
>
> Set new_order to be at least minimum folio order if it is set in
> split_huge_page_to_list() so that we can maintain minimum folio order
> requirement in the page cache.
>
> Update the debugfs write files used for testing to ensure the order
> is respected as well. We simply enforce the min order when a file
> mapping is used.
>
> Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
> Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
> ---
>   include/linux/huge_mm.h | 14 ++++++++----
>   mm/huge_memory.c        | 50 ++++++++++++++++++++++++++++++++++++++---
>   2 files changed, 57 insertions(+), 7 deletions(-)
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>

Cheers,

Hannes
--
Dr. Hannes Reinecke                  Kernel Storage Architect
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