On Wed, May 17, 2023 at 08:40:26AM +0100, Lorenzo Stoakes wrote: > > I'm not sure what you mean by "total flexibility" here. In my opinion it is > > also about how HW performs checksumming etc. > > I mean to say *_ops allow a lot of flexibility in how things are > handled. Certainly checksumming is a great example but in theory an > arbitrary filesystem could be doing, well, anything and always assuming > that only userland mappings should be modifying the underlying data. File systems need a wait to track when a page is dirtied so that it can be written back. Not much to do with flexbility.