table of contents
| 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¶
| June 2024 | Kernel Hackers Manual 3.10 |