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blk_limits_io_opt
Langue: en
Version: October 2010 (fedora - 01/12/10)
Section: 9 (Appels noyau Linux)
NAME
blk_limits_io_opt - set optimal request size for a deviceSYNOPSIS
- void blk_limits_io_opt(struct queue_limits * limits, unsigned int opt);
ARGUMENTS
limits
- the queue limits
opt
- smallest I/O 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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