[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <v7gcnb6a3kqolyx6jrusburtwhsnomg543jpulza233bjofesl@zrunbxkpaa2n>
Date: Fri, 22 Mar 2024 21:42:39 -0400
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: Boqun Feng <boqun.feng@...il.com>
Cc: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arch@...r.kernel.org, llvm@...ts.linux.dev, Miguel Ojeda <ojeda@...nel.org>,
Alex Gaynor <alex.gaynor@...il.com>, Wedson Almeida Filho <wedsonaf@...il.com>,
Gary Guo <gary@...yguo.net>, Björn Roy Baron <bjorn3_gh@...tonmail.com>,
Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>,
Alice Ryhl <aliceryhl@...gle.com>, Alan Stern <stern@...land.harvard.edu>,
Andrea Parri <parri.andrea@...il.com>, Will Deacon <will@...nel.org>,
Peter Zijlstra <peterz@...radead.org>, Nicholas Piggin <npiggin@...il.com>,
David Howells <dhowells@...hat.com>, Jade Alglave <j.alglave@....ac.uk>,
Luc Maranget <luc.maranget@...ia.fr>, "Paul E. McKenney" <paulmck@...nel.org>,
Akira Yokosawa <akiyks@...il.com>, Daniel Lustig <dlustig@...dia.com>,
Joel Fernandes <joel@...lfernandes.org>, Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>, kent.overstreet@...il.com,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>, elver@...gle.com, Mark Rutland <mark.rutland@....com>,
Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
Catalin Marinas <catalin.marinas@....com>, torvalds@...ux-foundation.org,
linux-arm-kernel@...ts.infradead.org, linux-fsdevel@...r.kernel.org
Subject: Re: [WIP 0/3] Memory model and atomic API in Rust
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.
Powered by blists - more mailing lists