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| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2008-09-12 17:57:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-09-12 17:57:23 -0700 |
| commit | f07d1501292b3b0d3276ee0e537005526a45e242 (patch) | |
| tree | df132456469046ec7f71ea4ac39723450c8e3c6e /Documentation/networking | |
| parent | 67333bb5679325db310bb612c1de3e6e47bb0043 (diff) | |
| download | blackbird-op-linux-f07d1501292b3b0d3276ee0e537005526a45e242.tar.gz blackbird-op-linux-f07d1501292b3b0d3276ee0e537005526a45e242.zip | |
multiq: Further multiqueue cleanup
This patch resolves a few issues found with multiq including wording
suggestions and a problem seen in the allocation of queues.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/multiqueue.txt | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/Documentation/networking/multiqueue.txt b/Documentation/networking/multiqueue.txt index 8c2b06b77f61..4caa0e314cc2 100644 --- a/Documentation/networking/multiqueue.txt +++ b/Documentation/networking/multiqueue.txt @@ -29,15 +29,15 @@ Section 2: Qdisc support for multiqueue devices ----------------------------------------------- -Currently two qdiscs support multiqueue devices. The first is the default -pfifo_fast qdisc. This qdisc supports one qdisc per hardware queue. A new -round-robin qdisc, sch_multiq also supports multiple hardware queues. The +Currently two qdiscs are optimized for multiqueue devices. The first is the +default pfifo_fast qdisc. This qdisc supports one qdisc per hardware queue. +A new round-robin qdisc, sch_multiq also supports multiple hardware queues. The qdisc is responsible for classifying the skb's and then directing the skb's to bands and queues based on the value in skb->queue_mapping. Use this field in the base driver to determine which queue to send the skb to. -sch_multiq has been added for hardware that wishes to avoid unnecessary -requeuing. It will cycle though the bands and verify that the hardware queue +sch_multiq has been added for hardware that wishes to avoid head-of-line +blocking. It will cycle though the bands and verify that the hardware queue associated with the band is not stopped prior to dequeuing a packet. On qdisc load, the number of bands is based on the number of queues on the @@ -63,8 +63,8 @@ band 1 => queue 1 band 2 => queue 2 band 3 => queue 3 -Traffic will begin flowing through each queue if your base device has either -the default simple_tx_hash or a custom netdev->select_queue() defined. +Traffic will begin flowing through each queue based on either the simple_tx_hash +function or based on netdev->select_queue() if you have it defined. The behavior of tc filters remains the same. However a new tc action, skbedit, has been added. Assuming you wanted to route all traffic to a |
