Unexpected issues with 2 NVME initiators using the same target

[Sagi Grimberg]

> send completion mitigation is still possible, if it is OK for the
> backing pages to remain, but I think a more sophisticated strategy is
> needed - eg maybe push some kind of NOP through the send q after a
> timer or only complete when the last available work is stuffed or
> something.

I'm not smart enough to come up with something like that.