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SubjectRe: [PATCH][RFC/v1][11/12] Add InfiniBand Documentation files
> +  When the IPoIB driver is loaded, it creates one interface for each
> + port using the P_Key at index 0. To create an interface with a
> + different P_Key, write the desired P_Key into the main interface's
> + /sys/class/net/<intf name>/create_child file. For example:
> +
> + echo 0x8001 > /sys/class/net/ib0/create_child
> +
> + This will create an interface named ib0.8001 with P_Key 0x8001. To
> + remove a subinterface, use the "delete_child" file:
> +
> + echo 0x8001 > /sys/class/net/ib0/delete_child
> +
> + The P_Key for any interface is given by the "pkey" file, and the
> + main interface for a subinterface is in "parent."

Any reason this doesn't use an interface similar to the normal vlan code?

And what is a P_Key?
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