Gregory Price wrote: [..] > More generally, I think a cxl-swap (cswap? ;V) would be useful exactly to > help identify when watch-and-wait tiering becomes more performant than > promote-on-first-use. If you can't beat a simple fast-swap, why bother? I think it is instructive to look at what happened with PMEM, i.e. a "pswap" idea never entered the discourse. The moment the memory is not byte-addressable, it might as well be an NVME device where it can support a queue-depth and async-dma.
