From: Peter Zijlstra <peterz@infradead.org>
To: Boqun Feng <boqun.feng@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, llvm@lists.linux.dev,
Miguel Ojeda <ojeda@kernel.org>,
Alex Gaynor <alex.gaynor@gmail.com>,
Wedson Almeida Filho <wedsonaf@gmail.com>,
Gary Guo <gary@garyguo.net>,
"Bj\"orn Roy Baron" <bjorn3_gh@protonmail.com>,
Benno Lossin <benno.lossin@proton.me>,
Andreas Hindborg <a.hindborg@samsung.com>,
Alice Ryhl <aliceryhl@google.com>,
Alan Stern <stern@rowland.harvard.edu>,
Andrea Parri <parri.andrea@gmail.com>,
Will Deacon <will@kernel.org>,
Nicholas Piggin <npiggin@gmail.com>,
David Howells <dhowells@redhat.com>,
Jade Alglave <j.alglave@ucl.ac.uk>,
Luc Maranget <luc.maranget@inria.fr>,
"Paul E. McKenney" <paulmck@kernel.org>,
Akira Yokosawa <akiyks@gmail.com>,
Daniel Lustig <dlustig@nvidia.com>,
Joel Fernandes <joel@joelfernandes.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
kent.overstreet@gmail.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
elver@google.com, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Catalin Marinas <catalin.marinas@arm.com>,
torvalds@linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [WIP 0/3] Memory model and atomic API in Rust
Date: Tue, 9 Apr 2024 12:50:15 +0200 [thread overview]
Message-ID: <20240409105015.GC21779@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <ZgHly_fioG7X4wGE@boqun-archlinux>
On Mon, Mar 25, 2024 at 01:59:55PM -0700, Boqun Feng wrote:
> On Mon, Mar 25, 2024 at 10:44:45AM +0000, Mark Rutland wrote:
> [...]
> > >
> > > * I choose to re-implement atomics in Rust `asm` because we are still
> > > figuring out how we can make it easy and maintainable for Rust to call
> > > a C function _inlinely_ (Gary makes some progress [2]). Otherwise,
> > > atomic primitives would be function calls, and that can be performance
> > > bottleneck in a few cases.
> >
> > I don't think we want to maintain two copies of each architecture's atomics.
> > This gets painful very quickly (e.g. as arm64's atomics get patched between
> > LL/SC and LSE forms).
> >
>
> No argument here ;-)
Didn't we talk about bindgen being able to convert inline C functions
into equivalent inline Rust functions? ISTR that getting stuck on Rust
not having a useful inline asm.
But fixing all that in a hurry seems like the much saner path forward.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Boqun Feng <boqun.feng@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, llvm@lists.linux.dev,
Miguel Ojeda <ojeda@kernel.org>,
Alex Gaynor <alex.gaynor@gmail.com>,
Wedson Almeida Filho <wedsonaf@gmail.com>,
Gary Guo <gary@garyguo.net>,
"Bj\"orn Roy Baron" <bjorn3_gh@protonmail.com>,
Benno Lossin <benno.lossin@proton.me>,
Andreas Hindborg <a.hindborg@samsung.com>,
Alice Ryhl <aliceryhl@google.com>,
Alan Stern <stern@rowland.harvard.edu>,
Andrea Parri <parri.andrea@gmail.com>,
Will Deacon <will@kernel.org>,
Nicholas Piggin <npiggin@gmail.com>,
David Howells <dhowells@redhat.com>,
Jade Alglave <j.alglave@ucl.ac.uk>,
Luc Maranget <luc.maranget@inria.fr>,
"Paul E. McKenney" <paulmck@kernel.org>,
Akira Yokosawa <akiyks@gmail.com>,
Daniel Lustig <dlustig@nvidia.com>,
Joel Fernandes <joel@joelfernandes.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
kent.overstreet@gmail.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
elver@google.com, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Catalin Marinas <catalin.marinas@arm.com>,
torvalds@linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [WIP 0/3] Memory model and atomic API in Rust
Date: Tue, 9 Apr 2024 12:50:15 +0200 [thread overview]
Message-ID: <20240409105015.GC21779@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <ZgHly_fioG7X4wGE@boqun-archlinux>
On Mon, Mar 25, 2024 at 01:59:55PM -0700, Boqun Feng wrote:
> On Mon, Mar 25, 2024 at 10:44:45AM +0000, Mark Rutland wrote:
> [...]
> > >
> > > * I choose to re-implement atomics in Rust `asm` because we are still
> > > figuring out how we can make it easy and maintainable for Rust to call
> > > a C function _inlinely_ (Gary makes some progress [2]). Otherwise,
> > > atomic primitives would be function calls, and that can be performance
> > > bottleneck in a few cases.
> >
> > I don't think we want to maintain two copies of each architecture's atomics.
> > This gets painful very quickly (e.g. as arm64's atomics get patched between
> > LL/SC and LSE forms).
> >
>
> No argument here ;-)
Didn't we talk about bindgen being able to convert inline C functions
into equivalent inline Rust functions? ISTR that getting stuck on Rust
not having a useful inline asm.
But fixing all that in a hurry seems like the much saner path forward.
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2024-04-09 10:50 UTC|newest]
Thread overview: 152+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-22 23:38 [WIP 0/3] Memory model and atomic API in Rust Boqun Feng
2024-03-22 23:38 ` Boqun Feng
2024-03-22 23:38 ` [WIP 1/3] rust: Introduce atomic module Boqun Feng
2024-03-22 23:38 ` Boqun Feng
2024-03-22 23:52 ` Andrew Lunn
2024-03-22 23:52 ` Andrew Lunn
2024-03-23 0:03 ` Boqun Feng
2024-03-23 0:03 ` Boqun Feng
2024-03-23 19:13 ` Miguel Ojeda
2024-03-23 19:13 ` Miguel Ojeda
2024-03-23 19:30 ` Boqun Feng
2024-03-23 19:30 ` Boqun Feng
2024-03-23 9:58 ` Alice Ryhl
2024-03-23 9:58 ` Alice Ryhl
2024-03-23 14:10 ` Andrew Lunn
2024-03-23 14:10 ` Andrew Lunn
2024-03-23 19:09 ` Miguel Ojeda
2024-03-23 19:09 ` Miguel Ojeda
2024-03-26 5:56 ` Trevor Gross
2024-03-26 5:56 ` Trevor Gross
2024-03-22 23:38 ` [WIP 2/3] rust: atomic: Add ARM64 fetch_add_relaxed() Boqun Feng
2024-03-22 23:38 ` Boqun Feng
2024-03-22 23:38 ` [WIP 3/3] rust: atomic: Add fetch_sub_release() Boqun Feng
2024-03-22 23:38 ` Boqun Feng
2024-03-22 23:57 ` [WIP 0/3] Memory model and atomic API in Rust Kent Overstreet
2024-03-22 23:57 ` Kent Overstreet
2024-03-23 0:12 ` Linus Torvalds
2024-03-23 0:12 ` Linus Torvalds
2024-03-23 0:21 ` Kent Overstreet
2024-03-23 0:21 ` Kent Overstreet
2024-03-23 0:36 ` Linus Torvalds
2024-03-23 0:36 ` Linus Torvalds
2024-03-23 2:07 ` Kent Overstreet
2024-03-23 2:07 ` Kent Overstreet
2024-03-23 2:26 ` Boqun Feng
2024-03-23 2:26 ` Boqun Feng
2024-03-23 2:33 ` Kent Overstreet
2024-03-23 2:33 ` Kent Overstreet
2024-03-23 2:57 ` Boqun Feng
2024-03-23 2:57 ` Boqun Feng
2024-03-23 3:10 ` Kent Overstreet
2024-03-23 3:10 ` Kent Overstreet
2024-03-23 3:51 ` Boqun Feng
2024-03-23 3:51 ` Boqun Feng
2024-03-23 4:16 ` Kent Overstreet
2024-03-23 4:16 ` Kent Overstreet
2024-03-25 13:56 ` Philipp Stanner
2024-03-25 13:56 ` Philipp Stanner
2024-03-25 17:44 ` Linus Torvalds
2024-03-25 17:44 ` Linus Torvalds
2024-03-25 18:59 ` Kent Overstreet
2024-03-25 18:59 ` Kent Overstreet
2024-03-25 19:44 ` Linus Torvalds
2024-03-25 19:44 ` Linus Torvalds
2024-03-25 21:14 ` Kent Overstreet
2024-03-25 21:14 ` Kent Overstreet
2024-03-25 21:37 ` Boqun Feng
2024-03-25 21:37 ` Boqun Feng
2024-03-25 22:09 ` Kent Overstreet
2024-03-25 22:09 ` Kent Overstreet
2024-03-25 22:38 ` Boqun Feng
2024-03-25 22:38 ` Boqun Feng
2024-03-25 23:02 ` Kent Overstreet
2024-03-25 23:02 ` Kent Overstreet
2024-03-25 23:41 ` Boqun Feng
2024-03-25 23:41 ` Boqun Feng
2024-03-26 0:05 ` Dr. David Alan Gilbert
2024-03-26 0:05 ` Dr. David Alan Gilbert
2024-03-26 0:36 ` Kent Overstreet
2024-03-26 0:36 ` Kent Overstreet
2024-03-26 1:35 ` Dr. David Alan Gilbert
2024-03-26 1:35 ` Dr. David Alan Gilbert
2024-03-26 3:28 ` Kent Overstreet
2024-03-26 3:28 ` Kent Overstreet
2024-03-26 2:51 ` Boqun Feng
2024-03-26 2:51 ` Boqun Feng
2024-03-26 3:49 ` Linus Torvalds
2024-03-26 3:49 ` Linus Torvalds
2024-03-26 14:35 ` Dr. David Alan Gilbert
2024-03-26 14:35 ` Dr. David Alan Gilbert
2024-03-27 16:16 ` comex
2024-03-27 16:16 ` comex
2024-03-27 18:50 ` Kent Overstreet
2024-03-27 18:50 ` Kent Overstreet
2024-03-27 19:07 ` Linus Torvalds
2024-03-27 19:07 ` Linus Torvalds
2024-03-27 19:41 ` Kent Overstreet
2024-03-27 19:41 ` Kent Overstreet
2024-03-27 20:45 ` Linus Torvalds
2024-03-27 20:45 ` Linus Torvalds
2024-03-27 21:41 ` Kent Overstreet
2024-03-27 21:41 ` Kent Overstreet
2024-03-27 22:57 ` Linus Torvalds
2024-03-27 22:57 ` Linus Torvalds
2024-03-27 23:35 ` Kent Overstreet
2024-03-27 23:35 ` Kent Overstreet
2024-03-27 21:21 ` Boqun Feng
2024-03-27 21:21 ` Boqun Feng
2024-03-27 21:49 ` Kent Overstreet
2024-03-27 21:49 ` Kent Overstreet
2024-03-27 22:26 ` Boqun Feng
2024-03-27 22:26 ` Boqun Feng
2024-03-27 21:56 ` comex
2024-03-27 21:56 ` comex
2024-03-27 22:02 ` comex
2024-03-27 22:02 ` comex
2024-04-05 17:13 ` Philipp Stanner
2024-04-05 17:13 ` Philipp Stanner
2024-04-08 16:02 ` Matthew Wilcox
2024-04-08 16:02 ` Matthew Wilcox
2024-04-08 16:55 ` Paul E. McKenney
2024-04-08 16:55 ` Paul E. McKenney
2024-04-08 17:03 ` Matthew Wilcox
2024-04-08 17:03 ` Matthew Wilcox
2024-04-08 18:47 ` Paul E. McKenney
2024-04-08 18:47 ` Paul E. McKenney
2024-04-09 0:58 ` Kent Overstreet
2024-04-09 0:58 ` Kent Overstreet
2024-04-09 4:47 ` Paul E. McKenney
2024-04-09 4:47 ` Paul E. McKenney
2024-04-08 17:01 ` Linus Torvalds
2024-04-08 17:01 ` Linus Torvalds
2024-04-08 18:14 ` Al Viro
2024-04-08 18:14 ` Al Viro
2024-04-08 20:05 ` Linus Torvalds
2024-04-08 20:05 ` Linus Torvalds
2024-03-23 21:40 ` comex
2024-03-23 21:40 ` comex
2024-03-24 15:22 ` Alan Stern
2024-03-24 15:22 ` Alan Stern
2024-03-24 17:37 ` comex
2024-03-24 17:37 ` comex
2024-03-23 0:15 ` Boqun Feng
2024-03-23 0:15 ` Boqun Feng
2024-03-23 0:49 ` Boqun Feng
2024-03-23 0:49 ` Boqun Feng
2024-03-23 1:42 ` Kent Overstreet
2024-03-23 1:42 ` Kent Overstreet
2024-03-23 14:29 ` Andrew Lunn
2024-03-23 14:29 ` Andrew Lunn
2024-03-23 14:41 ` Boqun Feng
2024-03-23 14:41 ` Boqun Feng
2024-03-23 14:55 ` Boqun Feng
2024-03-23 14:55 ` Boqun Feng
2024-03-25 10:44 ` Mark Rutland
2024-03-25 10:44 ` Mark Rutland
2024-03-25 20:59 ` Boqun Feng
2024-03-25 20:59 ` Boqun Feng
2024-04-09 10:50 ` Peter Zijlstra [this message]
2024-04-09 10:50 ` Peter Zijlstra
2024-04-16 18:12 ` Boqun Feng
2024-04-16 18:12 ` Boqun Feng
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