net/sched/Kconfig

Source file repositories/reference/linux-study-clean/net/sched/Kconfig

File Facts

System
Linux kernel
Corpus path
net/sched/Kconfig
Extension
[no extension]
Size
29070 bytes
Lines
970
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: build/configuration rule
Status
atlas-only

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0-only
#
# Traffic control configuration.
#

menuconfig NET_SCHED
	bool "QoS and/or fair queueing"
	select NET_SCH_FIFO
	help
	  When the kernel has several packets to send out over a network
	  device, it has to decide which ones to send first, which ones to
	  delay, and which ones to drop. This is the job of the queueing
	  disciplines, several different algorithms for how to do this
	  "fairly" have been proposed.

	  If you say N here, you will get the standard packet scheduler, which
	  is a FIFO (first come, first served). If you say Y here, you will be
	  able to choose from among several alternative algorithms which can
	  then be attached to different network devices. This is useful for
	  example if some of your network devices are real time devices that
	  need a certain minimum data flow rate, or if you need to limit the
	  maximum data flow rate for traffic which matches specified criteria.
	  This code is considered to be experimental.

	  To administer these schedulers, you'll need the user-level utilities
	  from the package iproute2+tc at
	  <https://www.kernel.org/pub/linux/utils/net/iproute2/>.  That package
	  also contains some documentation; for more, check out
	  <http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2>.

	  This Quality of Service (QoS) support will enable you to use
	  Differentiated Services (diffserv) and Resource Reservation Protocol
	  (RSVP) on your Linux router if you also say Y to the corresponding
	  classifiers below.  Documentation and software is at
	  <http://diffserv.sourceforge.net/>.

	  If you say Y here and to "/proc file system" below, you will be able
	  to read status information about packet schedulers from the file
	  /proc/net/psched.

	  The available schedulers are listed in the following questions; you
	  can say Y to as many as you like. If unsure, say N now.

if NET_SCHED

comment "Queueing/Scheduling"

config NET_SCH_HTB
	tristate "Hierarchical Token Bucket (HTB)"
	help
	  Say Y here if you want to use the Hierarchical Token Buckets (HTB)
	  packet scheduling algorithm. See
	  <http://luxik.cdi.cz/~devik/qos/htb/> for complete manual and
	  in-depth articles.

	  HTB is very similar to CBQ regarding its goals however is has
	  different properties and different algorithm.

	  To compile this code as a module, choose M here: the
	  module will be called sch_htb.

config NET_SCH_HFSC
	tristate "Hierarchical Fair Service Curve (HFSC)"
	help
	  Say Y here if you want to use the Hierarchical Fair Service Curve
	  (HFSC) packet scheduling algorithm.

	  To compile this code as a module, choose M here: the
	  module will be called sch_hfsc.

Annotation

Implementation Notes