[PATCH 04/14] block: take io_opt and io_min into account for max_sectors

[Martin K. Petersen]

Christoph,

> The soft max_sectors limit is normally capped by the hardware limits and
> an arbitrary upper limit enforced by the kernel, but can be modified by
> the user.  A few drivers want to increase this limit (nbd, rbd) or
> adjust it up or down based on hardware capabilities (sd).

Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>

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Martin K. Petersen	Oracle Linux Engineering