BLK_QUEUE_PHYSICAL_B(9) Block Devices BLK_QUEUE_PHYSICAL_B(9)
NAME blk_queue_physical_block_size - set physical block size for the queue
SYNOPSIS void blk_queue_physical_block_size(struct request_queue * q, unsigned int size);
ARGUMENTS q the request queue for the device
size the physical block size, in bytes
DESCRIPTION This should be set to the lowest possible sector size that the hardware can operate on without reverting to read-modify-write operations.
COPYRIGHT Kernel Hackers Manual 2.6. July 2015 BLK_QUEUE_PHYSICAL_B(9)