BLK_QUEUE_CHUNK_SECT(9)                   Block Devices                   BLK_QUEUE_CHUNK_SECT(9)



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.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   BLK_QUEUE_CHUNK_SECT(9)