bcachefs: set fgf order hint before starting a buffered write

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Set the preferred folio order in the fgp_flags by calling
fgf_set_order(). Page cache will try to allocate large folio of the
preferred order whenever possible instead of allocating multiple 0 order
folios.

This improves the buffered write performance up to 1.25x with default
mount options and up to 1.57x when mounted with no_data_io option with
the following fio workload:

fio --name=bcachefs --filename=/mnt/test  --size=100G \
     --ioengine=io_uring --iodepth=16 --rw=write --bs=128k

Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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Pankaj Raghav 2024-06-14 10:50:31 +00:00 • committed by Kent Overstreet

parent 2b02b9552c

commit febc33cb35

1 changed files with 3 additions and 2 deletions

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5

fs/bcachefs/fs-io-buffered.c

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