Re: [PATCH 05/17] nvme: wire-up support for async-passthru on char-device.

Sagi Grimberg
2022-03-16T13:52:55Z

>>>>>> No one cares that this has no multipathing capabilities what-so-ever?
>>>>>> despite being issued on the mpath device node?
>>>>>>
>>>>>> I know we are not doing multipathing for userspace today, but this
>>>>>> feels like an alternative I/O interface for nvme, seems a bit cripled
>>>>>> with zero multipathing capabilities...

[...]

> Got it, thanks. Passthrough (sync or async) just returns the failure
> to user-space if that fails.
> No attempt to retry/requeue as the block path does.

I know, and that was my original question, no one cares that this
interface completely lacks this capability? Maybe it is fine, but
it is not a trivial assumption given that this is designed to be more
than an interface to send admin/vs commands to the controller...