writeback minimum rate

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Hi *,

from looking at /sys/block/*/bcache/writeback_rate_debug, it seems there's a minimum writeback rate of "512".

Is there a configuration option to increase that value? Changes to writeback_rate get overwritten by bcache's algorithm.

I'd like to influence the hysteresis boundaries - our backend can take much more write action, especially at night. I don't want a "quick and full write-back", though.

Regards,
Jens

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