---
name: "blk_limits_io_min"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/blk_limits_io_min"
---

# blk\_limits\_io\_min(9)

set minimum request size for a device

## NAME

blk\_limits\_io\_min - set minimum request size for a device

## SYNOPSIS

**void blk\_limits\_io\_min(struct queue\_limits \*** *limits***, unsigned int** *min***);**

## ARGUMENTS

*limits*

the queue limits

*min*

smallest I/O size in bytes

## DESCRIPTION

Some devices have an internal block size bigger than the reported hardware sector size. This function can be used to signal the smallest I/O the device can perform without incurring a performance penalty.

## COPYRIGHT