net: qdisc: enhance default_qdisc documentation
Aside from some lingual cleanup, point out which interfaces are not or partly covered by this setting. Signed-off-by: Phil Sutter <phil@nwl.cc> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -54,13 +54,15 @@ default_qdisc
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The default queuing discipline to use for network devices. This allows
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overriding the default queue discipline of pfifo_fast with an
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alternative. Since the default queuing discipline is created with the
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no additional parameters so is best suited to queuing disciplines that
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work well without configuration like stochastic fair queue (sfq),
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CoDel (codel) or fair queue CoDel (fq_codel). Don't use queuing disciplines
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like Hierarchical Token Bucket or Deficit Round Robin which require setting
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up classes and bandwidths.
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overriding the default of pfifo_fast with an alternative. Since the default
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queuing discipline is created without additional parameters so is best suited
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to queuing disciplines that work well without configuration like stochastic
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fair queue (sfq), CoDel (codel) or fair queue CoDel (fq_codel). Don't use
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queuing disciplines like Hierarchical Token Bucket or Deficit Round Robin
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which require setting up classes and bandwidths. Note that physical multiqueue
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interfaces still use mq as root qdisc, which in turn uses this default for its
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leaves. Virtual devices (like e.g. lo or veth) ignore this setting and instead
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default to noqueue.
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Default: pfifo_fast
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busy_read
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