Re: [RFC PATCH v8 3/7] mm/filemap: Add mempolicy support to the filemap layer

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On 6/19/2025 9:33 PM, Matthew Wilcox wrote:
> On Wed, Jun 18, 2025 at 11:29:31AM +0000, Shivank Garg wrote:
>> From: Shivansh Dhiman <shivansh.dhiman@xxxxxxx>
>>
>> Add NUMA mempolicy support to the filemap allocation path by introducing
>> new APIs that take a mempolicy argument:
>> - filemap_grab_folio_mpol()
>> - filemap_alloc_folio_mpol()
>> - __filemap_get_folio_mpol()
> 
> You don't use these APIs in this series, so I can't evaludate whether
> any of my suggestiosn for improving this patch would actually work.
> NACK.  Introduce the APIs *with a user*.  Come on, this isn't a new
> requirement.

Hi willy,

Thank you for the feedback.

filemap_grab_folio_mpol() is used in [Patch 6/7] in kvm_gmem_prepare_folio().

filemap_alloc_folio_mpol() and __filemap_get_folio_mpol()) are internally used
to support the filemap_grab_folio_mpol().

Thanks,
Shivank




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