centos man page for blk_queue_io_min

BLK_QUEUE_IO_MIN(9)						   Block Devices					       BLK_QUEUE_IO_MIN(9)

NAME
       blk_queue_io_min - set minimum request size for the queue

SYNOPSIS
       void blk_queue_io_min(struct request_queue * q, unsigned int min);

ARGUMENTS
       q
	   the request queue for the device

       min
	   smallest I/O size in bytes

DESCRIPTION
       Storage devices may report a granularity or preferred minimum I/O size which is the smallest request the device can perform without
       incurring a performance penalty. For disk drives this is often the physical block size. For RAID arrays it is often the stripe chunk size.
       A properly aligned multiple of minimum_io_size is the preferred request size for workloads where a high number of I/O operations is
       desired.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       BLK_QUEUE_IO_MIN(9)