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Date:   Sun, 11 Dec 2022 14:03:57 +0800
From:   Chao Yu <>
To:     "Vishal Moola (Oracle)" <>,
Subject: Re: [f2fs-dev] [PATCH v4 16/23] f2fs: Convert f2fs_sync_meta_pages()
 to use filemap_get_folios_tag()

On 2022/11/3 0:10, Vishal Moola (Oracle) wrote:
> Convert function to use folios throughout. This is in preparation for the
> removal of find_get_pages_range_tag(). This change removes 5 calls to
> compound_head().
> Initially the function was checking if the previous page index is truly the
> previous page i.e. 1 index behind the current page. To convert to folios and
> maintain this check we need to make the check
> folio->index != prev + folio_nr_pages(previous folio) since we don't know
> how many pages are in a folio.
> At index i == 0 the check is guaranteed to succeed, so to workaround indexing
> bounds we can simply ignore the check for that specific index. This makes the
> initial assignment of prev trivial, so I removed that as well.
> Also modified a comment in commit_checkpoint for consistency.
> Signed-off-by: Vishal Moola (Oracle) <>

Acked-by: Chao Yu <>


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