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Re: [Qemu-devel] [PATCH RFC] hw/pvrdma: Proposal of a new pvrdma device

From: Jason Gunthorpe
Subject: Re: [Qemu-devel] [PATCH RFC] hw/pvrdma: Proposal of a new pvrdma device
Date: Thu, 6 Apr 2017 14:54:16 -0600
User-agent: Mutt/1.5.24 (2015-08-30)

On Thu, Apr 06, 2017 at 10:45:54PM +0300, Yuval Shaia wrote:

> > Just add my 2 cents. You didn't answer on my question about other possible
> > implementations. It can be SoftRoCE loopback optimizations, special ULP,
> > RDMA transport, virtual driver with multiple VFs and single PF.
> Please see my response to Jason's comments - eventually, when a support for
> VM to external host communication will be added - kdbr will become ULP as
> well.

So, is KDBR only to be used on the HV side? Ie it never shows up in the VM?

That is even weirder, we certainly do not want to see a kernel RDMA
ULP for any of this - the entire point of RDMA is to let user space
implement their protocols without needing a unique kernel component!!


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