linux-kernel - Re: [PATCH 7/8] mm: drop page_index/page_file_offset and convert swap helpers to use folio

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Date: Thu, 18 Apr 2024 04:30:46 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Barry Song <21cnbao@...il.com>
Cc: Kairui Song <kasong@...cent.com>, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Huang, Ying" <ying.huang@...el.com>, Chris Li <chrisl@...nel.org>,
	Barry Song <v-songbaohua@...o.com>,
	Ryan Roberts <ryan.roberts@....com>, Neil Brown <neilb@...e.de>,
	Minchan Kim <minchan@...nel.org>, Hugh Dickins <hughd@...gle.com>,
	David Hildenbrand <david@...hat.com>,
	Yosry Ahmed <yosryahmed@...gle.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/8] mm: drop page_index/page_file_offset and convert
 swap helpers to use folio

On Thu, Apr 18, 2024 at 01:55:28PM +1200, Barry Song wrote:
> I also find it rather odd that folio_file_page() is utilized for both
> swp and file.
> 
> mm/memory.c <<do_swap_page>>
>              page = folio_file_page(folio, swp_offset(entry));
> mm/swap_state.c <<swapin_readahead>>
>              return folio_file_page(folio, swp_offset(entry));
> mm/swapfile.c <<unuse_pte>>
>              page = folio_file_page(folio, swp_offset(entry));
> 
> Do you believe it's worthwhile to tidy up?

Why do you find it odd?  What would you propose instead?