I've been working on a library (in fs/netfs/) to provide network filesystem support services, with help particularly from Jeff Layton. The idea is to move the common features of the VM interface, including request splitting, operation retrying, local caching, content encryption, bounce buffering and compression into one place so that various filesystems can share it. This also intersects with the folios topic as one of the reasons for this now is to hide as much of the existence of folios/pages from the filesystem, instead giving it persistent iov iterators to describe the buffers available to it. It could be useful to get various network filesystem maintainers together to discuss it and how to do parts of it and how to roll it out into more filesystems if it suits them. This might qualify more for a BoF session than a full FS track session. Further, discussion of designing a more effective cache backend could be useful. I'm thinking along the lines of something that can store its data on a single file (or a raw blockdev) with indexing along the lines of what filesystem drivers such as openafs do. David
