BLK_QUEUE_IO_MIN - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Block Devices

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NAMEblk_queue_io_min − set minimum request size for the queue

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SYNOPSISvoid blk_queue_io_min(struct request_queue * q, unsigned int min);

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ARGUMENTSq the request queue for the device min smallest I/O size in bytes

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DESCRIPTIONStorage devices may report a granularity or preferred minimum I/O size which is the smallest request the device can perform without incurring a performance penalty​. For disk drives this is often the physical block size​. For RAID arrays it is often the stripe chunk size​. A properly aligned multiple of minimum_io_size is the preferred request size for workloads where a high number of I/O operations is desired​.

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