---
name: "blk_queue_bounce_limit"
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_queue_bounce_limit"
---

# blk\_queue\_bounce\_limit(9)

set bounce buffer limit for queue

## NAME

blk\_queue\_bounce\_limit - set bounce buffer limit for queue

## SYNOPSIS

**void blk\_queue\_bounce\_limit(struct request\_queue \*** *q***, u64** *max\_addr***);**

## ARGUMENTS

*q*

the request queue for the device

*max\_addr*

the maximum address the device can handle

## DESCRIPTION

Different hardware can have different requirements as to what pages it can do I/O directly to. A low level driver can call blk\_queue\_bounce\_limit to have lower memory pages allocated as bounce buffers for doing I/O to pages residing above *max\_addr*.

## COPYRIGHT