btrfs: make buffered write to copy one page a time

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Currently the btrfs_buffered_write() is preparing multiple page a time,
allowing a better performance.

But the current trend is to support larger folio as an optimization,
instead of implementing own multi-page optimization.

This is inspired by generic_perform_write(), which is copying one folio
a time.

Such change will prepare us to migrate to implement the write_begin()
and write_end() callbacks, and make every involved function a little
easier.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Qu Wenruo 2024-10-10 15:16:12 +10:30 • committed by David Sterba

parent b1c5f6eda2

commit c87c299776

3 changed files with 94 additions and 163 deletions

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239

fs/btrfs/file.c

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5

fs/btrfs/file.h

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15

fs/btrfs/free-space-cache.c

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