blk_queue_io_opt
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## Name

blk_queue_io_opt — set optimal request size for the queue

## Synopsis

`void blk_queue_io_opt (` | struct request_queue * q,
| unsigned int opt`)`;

## Arguments

`q`

  the request queue for the device

`opt`

  optimal request 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.

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