On Wed, Oct 19, 2022 at 10:15:26AM +0300, Sagi Grimberg wrote: > nvme-tcp will opportunistically try a network send directly from > .queue_rq(), but always with MSG_DONTWAIT, so that is not a problem. > > nbd though can block in .queue_rq() with blocking network sends, however > afaict nbd allocates a tagset per nbd_device, and also a request_queue > per device, so its effectively the same if the srcu is in the tagset or > in the request_queue. Yes, the only multiple request_queue per tag_set cases right now are nvme-tcp and mmc. There have been patches from iSCSI, but they seem to be stuck.
