Re: [PATCH v2 5/5] block: use chunk_sectors when evaluating stacked atomic write limits

[Martin K. Petersen]

John,

> Furthermore, io_min may be mutated when stacking devices, and this
> makes it a poor candidate to hold the stripe size. Such an example (of
> when io_min may change) would be when the io_min is less than the
> physical block size.

io_min is not allowed to be smaller than the physical_block_size. How
did we end up violating that requirement?

  logical_block_size <= physical_block_size <= io_min <= io_opt

-- 
Martin K. Petersen