On Fri, Mar 22, 2024 at 05:49:23PM -0700, Boqun Feng wrote: > On Fri, Mar 22, 2024 at 05:15:08PM -0700, Boqun Feng wrote: > [...] > > > > > > I wonder about that. The disadvantage of only supporting LKMM atomics is > > > that we'll be incompatible with third party code, and we don't want to > > > be rolling all of our own data structures forever. > > > > > > > A possible solution to that is a set of C++ memory model atomics > > implemented by LKMM atomics. That should be possible. > > > > Another possible "solution" works in the opposite direction, since the > folder rust/kernel/sync/atomic is quite stand-alone, we can export that > as a Rust crate (library), and third party code can support using LKMM > atomics instead of Rust own atomics ;-) Of course if the project is > supposed to work with Linux kernel. Not just from the Rust side, the C side would be useful as well. I've got a quicky, dirty, hacky version of that in bcachefs-tools, and I would switch immediately if someone took that over and made it a real project, and I'm quite sure other projects would as well.
