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blk_queue_io_opt
Langue: en
Version: October 2010 (fedora - 01/12/10)
Section: 9 (Appels noyau Linux)
NAME
blk_queue_io_opt - set optimal request size for the queueSYNOPSIS
- 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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