[ovs-dev] [PATCH] netdev-dpdk: add support for rings in secondary processes in IVSHMEM setups

[Ben Pfaff]

I understand now.  I recommend adding a Co-authored-by, then, to make
that clear.

On Wed, Jul 22, 2015 at 04:29:55PM -0700, Ethan Jackson wrote:
> Sort of.  Helped with the creation of the patch a bit so I figured I
> should add a sign off.  Someone other than me should review it for
> this reason.
> 
> Ethan
> 
> On Wed, Jul 22, 2015 at 3:07 PM, Ben Pfaff <blp at nicira.com> wrote:
> > On Wed, Jul 22, 2015 at 01:51:46PM -0700, Melvin Walls wrote:
> >> In order for OVS running inside a VM using IVSHMEM to recognize ports created
> >> on the host, you have to start vswitchd with the --proc-type=secondary EAL
> >> option.
> >>
> >> When creating rings in secondary processes functions like
> >> rte_eth_dev_configure() fail with the error code E_RTE_SECONDARY, i.e., the
> >> operations are not allowed in secondary processes. Avoiding this requires some
> >> changes to the way secondary processes handle dpdk rings.
> >>
> >> This patch changes dpdk_ring_create() to use rte_ring_lookup() instead of
> >> rte_ring_create() when called from a secondary process. It also introduces two
> >> functions: netdev_dpdk_ring_rxq_recv() and netdev_dpdk_ring_send__() to handle
> >> tx/rx on dpdk rings in secondary processes.
> >>
> >> Signed-off-by: Melvin Walls <mwalls67 at gmail.com>
> >> Signed-off-by: Ethan Jackson <ethan at nicira.com>
> >
> > These sign-offs are weird.  Ethan, is this Signed-off-by meant to be an
> > Acked-by from you?