rbd: set io_min, io_opt and discard_granularity to alloc_size

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Now that we have alloc_size that controls our discard behavior, it
doesn't make sense to have these set to object (set) size.  alloc_size
defaults to 64k, but because discard_granularity is likely 4M, only
ranges that are equal to or bigger than 4M can be considered during
fstrim.  A smaller io_min is also more likely to be met, resulting in
fewer deferred writes on bluestore OSDs.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>

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Ilya Dryomov 2019-03-15 14:50:04 +01:00

parent 9e98c678c2

commit 16d80c54ad

1 changed files with 4 additions and 4 deletions

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drivers/block/rbd.c

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