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  1. 18 Jul, 2008 6 commits
    • David S. Miller's avatar
      net: Use queue aware tests throughout. · fd2ea0a7
      David S. Miller authored 
      This effectively "flips the switch" by making the core networking
and multiqueue-aware drivers use the new TX multiqueue structures.

Non-multiqueue drivers need no changes.  The interfaces they use such
as netif_stop_queue() degenerate into an operation on TX queue zero.
So everything "just works" for them.

Code that really wants to do "X" to all TX queues now invokes a
routine that does so, such as netif_tx_wake_all_queues(),
netif_tx_stop_all_queues(), etc.

pktgen and netpoll required a little bit more surgery than the others.

In particular the pktgen changes, whilst functional, could be largely
improved.  The initial check in pktgen_xmit() will sometimes check the
wrong queue, which is mostly harmless.  The thing to do is probably to
invoke fill_packet() earlier.

The bulk of the netpoll changes is to make the code operate solely on
the TX queue indicated by by the SKB queue mapping.

Setting of the SKB queue mapping is entirely confined inside of
net/core/dev.c:dev_pick_tx().  If we end up needing any kind of
special semantics (drops, for example) it will be implemented here.

Finally, we now have a "real_num_tx_queues" which is where the driver
indicates how many TX queues are actually active.

With IGB changes from Jeff Kirsher.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fd2ea0a7
    • David S. Miller's avatar
      mac80211: Temporarily mark QoS support BROKEN. · 24344d26
      David S. Miller authored 
      We will undo this after a few changsets.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      24344d26
    • David S. Miller's avatar
      pkt_sched: Remove RR scheduler. · 1d8ae3fd
      David S. Miller authored 
      This actually fixes a bug added by the RR scheduler changes.  The
->bands and ->prio2band parameters were being set outside of the
sch_tree_lock() and thus could result in strange behavior and
inconsistencies.

It might be possible, in the new design (where there will be one qdisc
per device TX queue) to allow similar functionality via a TX hash
algorithm for RR but I really see no reason to export this aspect of
how these multiqueue cards actually implement the scheduling of the
the individual DMA TX rings and the single physical MAC/PHY port.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1d8ae3fd
    • David S. Miller's avatar
      netdev: Kill NETIF_F_MULTI_QUEUE. · 09e83b5d
      David S. Miller authored 
      There is no need for a feature bit for something that
can be tested by simply checking the TX queue count.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      09e83b5d
    • David S. Miller's avatar
      netdev: Allocate multiple queues for TX. · e8a0464c
      David S. Miller authored 
      alloc_netdev_mq() now allocates an array of netdev_queue
structures for TX, based upon the queue_count argument.

Furthermore, all accesses to the TX queues are now vectored
through the netdev_get_tx_queue() and netdev_for_each_tx_queue()
interfaces.  This makes it easy to grep the tree for all
things that want to get to a TX queue of a net device.

Problem spots which are not really multiqueue aware yet, and
only work with one queue, can easily be spotted by grepping
for all netdev_get_tx_queue() calls that pass in a zero index.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e8a0464c
    • David S. Miller's avatar
      igb: Kill CONFIG_NETDEVICES_MULTIQUEUE references, no longer exists. · 070825b3
      David S. Miller authored 
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      070825b3
  3. 17 Jul, 2008 28 commits
  5. 16 Jul, 2008 5 commits
  7. 15 Jul, 2008 1 commit