On Tue, Nov 19, 2024 at 01:24:01PM +0200, Abdiel Janulgue wrote: > This series aims to add support for pages that are not constructed by an > instance of the rust Page abstraction, for example those returned by > vmalloc_to_page() or virt_to_page(). > > Changes sinve v3: > - Use the struct page's reference count to decide when to free the > allocation (Alice Ryhl, Boqun Feng). Bleh, this is going to be "exciting". We're in the middle of a multi-year project to remove refcounts from struct page. The lifetime of a page will be controlled by the memdesc that it belongs to. Some of those memdescs will have refcounts, but others will not. We don't have a fully formed destination yet, so I can't give you a definite answer to a lot of questions. Obviously I don't want to hold up the Rust project in any way, but I need to know that what we're trying to do will be expressible in Rust. Can we avoid referring to a page's refcount?
