bcachefs: Fix unnecessary read amplificaiton when allocating ec stripes

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When allocating an erasure coding stripe, bcachefs will always reuse any
partial stripes before reserving a new stripe. This causes unnecessary
read amplification when preparing a stripe for writing. This patch changes
bcachefs to always reserve new stripes first, only relying on stripe reuse
when copygc needs more time to empty buckets from existing stripes.

Signed-off-by: Robbie Litchfield <blam.kiwi@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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Robbie Litchfield 2021-02-10 13:18:13 +13:00 • committed by Kent Overstreet

parent 2bb748a695

commit 0ef837a0cc

1 changed files with 92 additions and 63 deletions

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fs/bcachefs/ec.c

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