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[RFC,v2,0/5] veth: more flexible channels number configuration

Message ID cover.1626449533.git.pabeni@redhat.com
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Series veth: more flexible channels number configuration | expand

Message

Paolo Abeni July 16, 2021, 3:34 p.m. UTC 
XDP setups can benefit from multiple veth RX/TX queues. Currently
veth allow setting such number only at creation time via the 
'numrxqueues' and 'numtxqueues' parameters.

This series introduces support for the ethtool set_channel operation
and allows configuring the queue number via a new module parameter.

The veth default configuration is not changed.

Finally self-tests are updated to check the new features, with both
valid and invalid arguments.

This iteration covers the feedback provided by Toke and Jakub.

RFC v1 -> RFC v2:
 - report more consistent 'combined' count
 - make set_channel as resilient as possible to errors
 - drop module parameter - but I would still consider it.
 - more self-tests

Paolo Abeni (5):
  veth: always report zero combined channels
  veth: factor out initialization helper
  veth: implement support for set_channel ethtool op
  veth: create by default nr_possible_cpus queues
  selftests: net: veth: add tests for set_channel

 drivers/net/veth.c                  | 305 +++++++++++++++++++++++-----
 tools/testing/selftests/net/veth.sh | 183 ++++++++++++++++-
 2 files changed, 434 insertions(+), 54 deletions(-)