centos man page for blk_limits_io_opt

Query: blk_limits_io_opt

OS: centos

Section: 9

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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 3.10 June 2014 BLK_LIMITS_IO_OPT(9)