table of contents
| BLK_QUEUE_IO_OPT(9) | Block Devices | BLK_QUEUE_IO_OPT(9) |
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.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |