kconfig

linux 内核源代码

#
# 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 <ftp://ftp.tux.org/pub/net/ip-routing/>.
	  That package also contains some documentation; for more, check out
	  <http://linux-net.osdl.org/index.php/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_CBQ
	tristate "Class Based Queueing (CBQ)"
	---help---
	  Say Y here if you want to use the Class-Based Queueing (CBQ) packet
	  scheduling algorithm. This algorithm classifies the waiting packets
	  into a tree-like hierarchy of classes; the leaves of this tree are
	  in turn scheduled by separate algorithms.

	  See the top of <file:net/sched/sch_cbq.c> for more details.

	  CBQ is a commonly used scheduler, so if you're unsure, you should
	  say Y here. Then say Y to all the queueing algorithms below that you
	  want to use as leaf disciplines.

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

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.

config NET_SCH_ATM
	tristate "ATM Virtual Circuits (ATM)"
	depends on ATM
	---help---
	  Say Y here if you want to use the ATM pseudo-scheduler.  This
	  provides a framework for invoking classifiers, which in turn
	  select classes of this queuing discipline.  Each class maps
	  the flow(s) it is handling to a given virtual circuit.

	  See the top of <file:net/sched/sch_atm.c> for more details.

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

config NET_SCH_PRIO
	tristate "Multi Band Priority Queueing (PRIO)"
	---help---
	  Say Y here if you want to use an n-band priority queue packet
	  scheduler.

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

config NET_SCH_RR
	tristate "Multi Band Round Robin Queuing (RR)"
	select NET_SCH_PRIO
	---help---
	  Say Y here if you want to use an n-band round robin packet
	  scheduler.

	  The module uses sch_prio for its framework and is aliased as
	  sch_rr, so it will load sch_prio, although it is referred
	  to using sch_rr.

config NET_SCH_RED
	tristate "Random Early Detection (RED)"
	---help---
	  Say Y here if you want to use the Random Early Detection (RED)
	  packet scheduling algorithm.

	  See the top of <file:net/sched/sch_red.c> for more details.

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

config NET_SCH_SFQ
	tristate "Stochastic Fairness Queueing (SFQ)"
	---help---
	  Say Y here if you want to use the Stochastic Fairness Queueing (SFQ)
	  packet scheduling algorithm.

	  See the top of <file:net/sched/sch_sfq.c> for more details.

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

config NET_SCH_TEQL
	tristate "True Link Equalizer (TEQL)"
	---help---
	  Say Y here if you want to use the True Link Equalizer (TLE) packet
	  scheduling algorithm. This queueing discipline allows the combination
	  of several physical devices into one virtual device.

	  See the top of <file:net/sched/sch_teql.c> for more details.

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

config NET_SCH_TBF
	tristate "Token Bucket Filter (TBF)"
	---help---
	  Say Y here if you want to use the Token Bucket Filter (TBF) packet
	  scheduling algorithm.

	  See the top of <file:net/sched/sch_tbf.c> for more details.

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

config NET_SCH_GRED
	tristate "Generic Random Early Detection (GRED)"
	---help---
	  Say Y here if you want to use the Generic Random Early Detection
	  (GRED) packet scheduling algorithm for some of your network devices
	  (see the top of <file:net/sched/sch_red.c> for details and
	  references about the algorithm).

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

config NET_SCH_DSMARK
	tristate "Differentiated Services marker (DSMARK)"
	---help---
	  Say Y if you want to schedule packets according to the
	  Differentiated Services architecture proposed in RFC 2475.
	  Technical information on this method, with pointers to associated
	  RFCs, is available at <http://www.gta.ufrj.br/diffserv/>.

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

config NET_SCH_NETEM
	tristate "Network emulator (NETEM)"
	---help---
	  Say Y if you want to emulate network delay, loss, and packet
	  re-ordering. This is often useful to simulate networks when
	  testing applications or protocols.

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

	  If unsure, say N.

config NET_SCH_INGRESS
	tristate "Ingress Qdisc"
	---help---
	  Say Y here if you want to use classifiers for incoming packets.
	  If unsure, say Y.

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

comment "Classification"

config NET_CLS
	boolean

config NET_CLS_BASIC
	tristate "Elementary classification (BASIC)"
	select NET_CLS
	---help---
	  Say Y here if you want to be able to classify packets using
	  only extended matches and actions.

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

config NET_CLS_TCINDEX
	tristate "Traffic-Control Index (TCINDEX)"
	select NET_CLS
	---help---
	  Say Y here if you want to be able to classify packets based on
	  traffic control indices. You will want this feature if you want
	  to implement Differentiated Services together with DSMARK.

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

config NET_CLS_ROUTE4
	tristate "Routing decision (ROUTE)"
	select NET_CLS_ROUTE
	select NET_CLS
	---help---
	  If you say Y here, you will be able to classify packets
	  according to the route table entry they matched.

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

config NET_CLS_ROUTE
	bool

config NET_CLS_FW
	tristate "Netfilter mark (FW)"
	select NET_CLS