'\" t
.\"     Title: blk_queue_io_min
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Block Devices
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "BLK_QUEUE_IO_MIN" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Block Devices"
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.SH "NAME"
blk_queue_io_min \- set minimum request size for the queue
.SH "SYNOPSIS"
.HP \w'void\ blk_queue_io_min('u
.BI "void blk_queue_io_min(struct\ request_queue\ *\ " "q" ", unsigned\ int\ " "min" ");"
.SH "ARGUMENTS"
.PP
\fIq\fR
.RS 4
the request queue for the device
.RE
.PP
\fImin\fR
.RS 4
smallest I/O size in bytes
.RE
.SH "DESCRIPTION"
.PP
Storage 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\&.
.SH "COPYRIGHT"
.br