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Message-ID: <0e8605d4-3be2-481f-86d7-1d3d4a8386c4@gmail.com>
Date: Wed, 6 Dec 2023 12:49:25 -0300
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Subject: Re: [PATCH 1/2] rust: sync: add `CondVar::notify_sync`
To: Alice Ryhl <aliceryhl@google.com>, Miguel Ojeda <ojeda@kernel.org>,
 Alex Gaynor <alex.gaynor@gmail.com>,
 Wedson Almeida Filho <wedsonaf@gmail.com>, Boqun Feng
 <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
 =?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= <bjorn3_gh@protonmail.com>,
 Benno Lossin <benno.lossin@proton.me>,
 Andreas Hindborg <a.hindborg@samsung.com>,
 Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
 Will Deacon <will@kernel.org>, Waiman Long <longman@redhat.com>
Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20231206-rb-new-condvar-methods-v1-0-33a4cab7fdaa@google.com>
 <20231206-rb-new-condvar-methods-v1-1-33a4cab7fdaa@google.com>
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From: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
In-Reply-To: <20231206-rb-new-condvar-methods-v1-1-33a4cab7fdaa@google.com>
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On 12/6/23 07:09, Alice Ryhl wrote:
> Wake up another thread synchronously.
> 
> This method behaves like `notify_one`, except that it hints to the
> scheduler that the current thread is about to go to sleep, so it should
> schedule the target thread on the same CPU.
> 
> This is used by Rust Binder as a performance optimization. When sending
> a transaction to a different process, we usually know which thread will
> handle it, so we can schedule that thread for execution next on this
> CPU for better cache locality.
> 
> Signed-off-by: Alice Ryhl <aliceryhl@google.com>
> ---
> [...]
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>