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netdev-dpdk: Use ->reconfigure() call to change rx/tx queues.

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This introduces in dpif-netdev and netdev-dpdk the first use for the
newly introduce reconfigure netdev call.

When a request to change the number of queues comes, netdev-dpdk will
remember this and notify the upper layer via
netdev_request_reconfigure().

The datapath, instead of periodically calling netdev_set_multiq(), can
detect this and call reconfigure().

This mechanism can also be used to:
* Automatically match the number of rxq with the one provided by qemu
  via the new_device callback.
* Provide a way to change the MTU of dpdk devices at runtime.
* Move a DPDK vhost device to the proper NUMA socket.

Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
Tested-by: Ilya Maximets <i.maximets@samsung.com>
Acked-by: Ilya Maximets <i.maximets@samsung.com>
This commit is contained in:
Daniele Di Proietto
2016-02-26 15:58:24 -08:00
parent 790fb3b745
commit 050c60bfb5
9 changed files with 160 additions and 174 deletions
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2
lib/netdev-linux.c
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@@ -2766,7 +2766,7 @@ netdev_linux_update_flags(struct netdev *netdev_, enum netdev_flags off,
NULL, /* push header */ \
NULL, /* pop header */ \
NULL, /* get_numa_id */ \
NULL, /* set_multiq */ \
NULL, /* set_tx_multiq */ \
\
netdev_linux_send, \
netdev_linux_send_wait, \