On Tue, 2017-09-05 at 20:55 +0900, Damien Le Moal wrote: > Reporting a maximum number of blocks that is not aligned on the device > physical size would cause a large write same request to be split into > physically unaligned chunks by __blkdev_issue_write_zeroes() and > __blkdev_issue_write_same(), even if the caller of these functions took > care to align its request to physical sectors. > > So make sure the maximum reported is aligned to the device physical > block size. This is only an optional optimization for regular disks, > but this is mandatory to avoid failure of large write same requests > directed at sequential write required zones of host-managed ZBC disks. Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxx>
