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

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Message-ID: <2d571f86-67bf-42f5-a20f-6c691ececae9@amd.com>
Date: Fri, 20 Jun 2025 20:22:49 +0530
From: Shivank Garg <shivankg@....com>
To: Matthew Wilcox <willy@...radead.org>
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Subject: Re: [RFC PATCH v8 3/7] mm/filemap: Add mempolicy support to the
 filemap layer



On 6/20/2025 8:04 PM, Matthew Wilcox wrote:
> On Fri, Jun 20, 2025 at 11:29:20AM +0530, Shivank Garg wrote:
>> 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().
> 
> That's not better.  We don't add unused functions, and unless there's
> something coming that's going to use them, the entire structure of this
> is wrong.
> 
> filemap_grab_folio() is a convenience function that avoids us having to
> specify the other two arguments to __filemap_get_folio().  Since there's
> no indication at this point that there are going to be more callers of
> it, filemap_grab_folio_mpol() should not even exist.
> 
> I'll send a pair of patches which should be sufficient for your needs.

Thank you willy :)
I'll them add to my series.

Thanks,
Shivank