blk_queue_io_min man page on Oracle

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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 3.8.	   June 2014		   BLK_QUEUE_IO_MIN(9)
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