[PATCH 07/13] block: lift setting the readahead size into the block layer

[Martin K. Petersen]

Christoph,

> Drivers shouldn't really mess with the readahead size, as that is a VM
> concept.  Instead set it based on the optimal I/O size by lifting the
> algorithm from the md driver when registering the disk.  Also set
> bdi->io_pages there as well by applying the same scheme based on
> max_sectors.  To ensure the limits work well for stacking drivers a
> new helper is added to update the readahead limits from the block
> limits, which is also called from disk_stack_limits.

Looks good!

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

-- 
Martin K. Petersen	Oracle Linux Engineering