On Fri, May 26, 2023 at 12:55:44AM -0700, Luis Chamberlain wrote: > This is an initial attempt to add support for block size > PAGE_SIZE for tmpfs. > Why would you want this? It helps us experiment with higher order folio uses > with fs APIS and helps us test out corner cases which would likely need > to be accounted for sooner or later if and when filesystems enable support > for this. Better review early and burn early than continue on in the wrong > direction so looking for early feedback. I think this is entirely the wrong direction to go in. You're coming at this from a block layer perspective, and we have two ways of doing large block devices -- qemu nvme and brd. tmpfs should be like other filesystems and opportunistically use folios of whatever size makes sense. Don't add a mount option to specify what size folios to use.
