Re: [PATCH V2 09/12] net/eipoib: Add main driver functionality

On 8/3/2012 2:33 PM, David Miller wrote:

From: Ali Ayoub <redacted>
Date: Fri, 03 Aug 2012 13:31:35 -0700

quoted

With eIPoIB architecture, the VM sees standard Ethernet emulator,
allowing the administrator to enslave eIPoIB PIF to the vSwitch/vBridge
as if it was standard Ethernet. Other approaches that exposes IB QP to
the VM (with w/o bypassing the kernel) won't be possible with the
current emulators and management tools.

So then fix the emulators and management tools to handle IB instead
of adding this bogus new protocol?

This new protocol seems to exist only because you don't want to have
to enhance the emulators and tools, and I'm sorry that isn't a valid
reason to do something like this.

This driver exists to allow the user to have an Ethernet interface on
top of a high-speed InfiniBand (IB) interconnect.
Users would like to use sockets API from the VM without re-writing their
applications on top of IB verbs, this driver meant to allow such a user
to do so.

Exposing IB emulators and having IB support in the management tools for
the VM/Hypervisor won't address the usecases that this driver meant for.

With this driver, existing VMs, and their existing IP applications, can
run as-is on InfiniBand network.