blk_queue_chunk_sectors
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## Name

blk_queue_chunk_sectors — set size of the chunk for this queue

## Synopsis

`void blk_queue_chunk_sectors (` | struct request_queue * q,
| unsigned int chunk_sectors`)`;

## Arguments

`q`

  the request queue for the device

`chunk_sectors`

  chunk sectors in the usual 512b unit

## Description

If a driver doesn't want IOs to cross a given chunk size, it can set this limit and prevent merging across chunks. Note that the chunk size must currently be a power-of-2 in sectors. Also note that the block layer must accept a page worth of data at any offset. So if the crossing of chunks is a hard limitation in the driver, it must still be prepared to split single page bios.

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