I've also thought it would be nice if Linux's dirty page handling was more granular. But at the same time, whenever dirty pages are a concern it's usually one l

I've also thought it would be nice if Linux's dirty page handling was more granular. But at the same time, whenever dirty pages are a concern it's usually one large file or one NFS mount or one USB device. The system otherwise doesn't have a great deal of dirty pages to bother reporting on. Also programs have access to selective file flushing with fsync() so there is at least that.