Re: [PATCH] nvme: remove multipath module parameter

[Keith Busch]

On Tue, Feb 18, 2025 at 06:06:05PM -0500, John Meneghini wrote:
> OK, maybe you have a use case in mind. I'll assume you do: some
> applications want to disable native nvme multipathing and to see
> all namespace paths in user space, and they are using this parameter
> to do it. These are ostensibly user space MP applications.

You can have a ublk frontend device with individual namespace paths on
the backend, and let ublkserver do whatever it wants with them.

> So what happens when one of these user space MP applications needs
> a change or a bug bug fix in the kernel?  Are those patches being
> merged into the kernel under a different auspices... is it just
> DMMP that we don't want to enable support for?

I think patches exporting driver private information is a pretty clear
indicator it's for stacking drivers.