From 9fba7a4768a5931df97af158cc6e81cf3d06ed3a Mon Sep 17 00:00:00 2001
From: Christopher Tee <christopherfytee@gmail.com>
Date: Tue, 24 Jun 2025 15:30:26 -0400
Subject: [PATCH] Consistently use `Ordering::Relaxed` for standalone atomic
 use cases (#14190)

---
 crates/uv-configuration/src/threading.rs | 2 +-
 crates/uv-warnings/src/lib.rs            | 8 ++++----
 crates/uv/src/lib.rs                     | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/crates/uv-configuration/src/threading.rs b/crates/uv-configuration/src/threading.rs
index 58b6190a6..2f70b5d81 100644
--- a/crates/uv-configuration/src/threading.rs
+++ b/crates/uv-configuration/src/threading.rs
@@ -62,7 +62,7 @@ pub static RAYON_PARALLELISM: AtomicUsize = AtomicUsize::new(0);
 /// `LazyLock::force(&RAYON_INITIALIZE)`.
 pub static RAYON_INITIALIZE: LazyLock<()> = LazyLock::new(|| {
     rayon::ThreadPoolBuilder::new()
-        .num_threads(RAYON_PARALLELISM.load(Ordering::SeqCst))
+        .num_threads(RAYON_PARALLELISM.load(Ordering::Relaxed))
         .stack_size(min_stack_size())
         .build_global()
         .expect("failed to initialize global rayon pool");
diff --git a/crates/uv-warnings/src/lib.rs b/crates/uv-warnings/src/lib.rs
index 5f2287cac..2b664be8d 100644
--- a/crates/uv-warnings/src/lib.rs
+++ b/crates/uv-warnings/src/lib.rs
@@ -13,12 +13,12 @@ pub static ENABLED: AtomicBool = AtomicBool::new(false);
 
 /// Enable user-facing warnings.
 pub fn enable() {
-    ENABLED.store(true, std::sync::atomic::Ordering::SeqCst);
+    ENABLED.store(true, std::sync::atomic::Ordering::Relaxed);
 }
 
 /// Disable user-facing warnings.
 pub fn disable() {
-    ENABLED.store(false, std::sync::atomic::Ordering::SeqCst);
+    ENABLED.store(false, std::sync::atomic::Ordering::Relaxed);
 }
 
 /// Warn a user, if warnings are enabled.
@@ -28,7 +28,7 @@ macro_rules! warn_user {
         use $crate::anstream::eprintln;
         use $crate::owo_colors::OwoColorize;
 
-        if $crate::ENABLED.load(std::sync::atomic::Ordering::SeqCst) {
+        if $crate::ENABLED.load(std::sync::atomic::Ordering::Relaxed) {
             let message = format!("{}", format_args!($($arg)*));
             let formatted = message.bold();
             eprintln!("{}{} {formatted}", "warning".yellow().bold(), ":".bold());
@@ -46,7 +46,7 @@ macro_rules! warn_user_once {
         use $crate::anstream::eprintln;
         use $crate::owo_colors::OwoColorize;
 
-        if $crate::ENABLED.load(std::sync::atomic::Ordering::SeqCst) {
+        if $crate::ENABLED.load(std::sync::atomic::Ordering::Relaxed) {
             if let Ok(mut states) = $crate::WARNINGS.lock() {
                 let message = format!("{}", format_args!($($arg)*));
                 if states.insert(message.clone()) {
diff --git a/crates/uv/src/lib.rs b/crates/uv/src/lib.rs
index fd2e28fae..ab4aee9e9 100644
--- a/crates/uv/src/lib.rs
+++ b/crates/uv/src/lib.rs
@@ -400,7 +400,7 @@ async fn run(mut cli: Cli) -> Result<ExitStatus> {
     }))?;
 
     // Don't initialize the rayon threadpool yet, this is too costly when we're doing a noop sync.
-    uv_configuration::RAYON_PARALLELISM.store(globals.concurrency.installs, Ordering::SeqCst);
+    uv_configuration::RAYON_PARALLELISM.store(globals.concurrency.installs, Ordering::Relaxed);
 
     debug!("uv {}", uv_cli::version::uv_self_version());