[PATCH for-next 3/4] io_uring: grow a field in struct io_uring_cmd

[Daniel Wagner]

On Thu, Jul 14, 2022 at 01:49:23PM +0530, Kanchan Joshi wrote:
> If path is not available, retry is not done immediately rather we wait for
> path to be available (as underlying controller may still be
> resetting/connecting). List helped as command gets added into
> it (and submitter/io_uring gets the control back), and retry is done
> exact point in time.
> But yes, it won't harm if we do couple of retries even if path is known
> not to be available (somewhat like iopoll). As this situation is
> not common. And with that scheme, we don't have to link io_uring_cmd.

Stupid question does it only fail over immediately when the path is not
available or any failure? If it fails over for everything it's possible
the target gets the same request twice. FWIW, we are just debugging this
scenario right now.