Re: [f2fs-dev] [PATCH v4 16/23] f2fs: Convert f2fs_sync_meta_pages() to use filemap_get_folios_tag()

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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) <vishal.moola@xxxxxxxxx>

Acked-by: Chao Yu <chao@xxxxxxxxxx>

Thanks,



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