blk_limits_io_opt man page on Scientific

blk_limits_io_opt man page on Scientific

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BLK_LIMITS_IO_OPT(9)		 Block Devices		  BLK_LIMITS_IO_OPT(9)

NAME
       blk_limits_io_opt - set optimal request size for a device

SYNOPSIS
       void blk_limits_io_opt(struct queue_limits * limits, unsigned int opt);

ARGUMENTS
       limits
	   the queue limits

       opt
	   smallest I/O size in bytes

DESCRIPTION
       Storage devices may report an optimal I/O size, which is the device´s
       preferred unit for sustained I/O. This is rarely reported for disk
       drives. For RAID arrays it is usually the stripe width or the internal
       track size. A properly aligned multiple of optimal_io_size is the
       preferred request size for workloads where sustained throughput is
       desired.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013		  BLK_LIMITS_IO_OPT(9)

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