Possible to enable io_poll on fabric (RoCE) connected NVME devices?

[Flash-28]

I've successfully been able to enable io_polling on an Ubuntu linux system and confirmed that io_poll is set to 1 for local devices.

However, when attempting to do the same against NVMe devices over a fabric (RoCE), I see that io_poll is set to 0 on those devices.
While t/one-core-peak.sh doesn't run properly against fabric connected devices, I can manually set most/all required settings, with the exception of io_poll, where I am met with "bash: echo: write error: Invalid argument"

Is there a way to enable io_poll on fabric connected devices, or does this only work against locally attached devices?

[axboe]

This isn't a fio related question, this is a kernel side support thing. If you get -1/EINVAL on writing to the io_poll file, the target doesn't have the io polling feature.