Stephen, >> It would be useful if those configurations were not left behind so >> that Linux could feasibly deploy offload code to a controller in the >> PCI domain. > > Agreed. I think this would be great. Kind of like the XCOPY framework > that was proposed a while back for SCSI devices [1] but updated to also > include NVMe devices. That is definitely a use case we would like this > framework to support. I'm on my umpteenth rewrite of the block/SCSI offload code. It is not as protocol-agnostic as I would like in the block layer facing downwards. It has proven quite hard to reconcile token-based and EXTENDED COPY semantics along with the desire to support stacking. But from an application/filesystem perspective everything looks the same regardless of the intricacies of the device. Nothing is preventing us from supporting other protocols... -- Martin K. Petersen Oracle Linux Engineering
