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test: remove churn() task from lifo_stealable

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Now, we don't rely on the presence of another task to prevent workers
from parking in the test. This way, it validates that we are correctly
unparking other workers. See
https://github.com/tokio-rs/tokio/pull/8069#issuecomment-4274244723
This commit is contained in:
Eliza Weisman
2026-04-18 11:01:28 -07:00
parent bc62e2d94c
commit 7c221a4f43
1 changed files with 0 additions and 13 deletions
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tokio/tests/rt_threaded.rs
-13
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@@ -730,18 +730,6 @@ fn lifo_stealable() {
.unwrap();
rt.block_on(async {
// Keep the runtime busy so that the workers that might steal the
// blocked task don't all park themselves forever.
//
// Since this task will always be woken by whichever worker is holding
// the time driver, rather than a worker that's executing tasks, it
// shouldn't ever kick the victim task out of its worker's LIFO slot.
let churn = tokio::spawn(async move {
loop {
tokio::time::sleep(Duration::from_millis(4)).await;
}
});
let victim_task_joined = tokio::spawn(async move {
println!("[victim] task started");
task_started_tx.send(()).unwrap();
@@ -791,7 +779,6 @@ fn lifo_stealable() {
// Before possibly panicking, make sure that we wake up the blocker task
// so that it doesn't stop the runtime from shutting down.
block_thread_tx.send(()).unwrap();
churn.abort();
result
.expect("task in LIFO slot should complete within 30 seconds")
.expect("task in LIFO slot should not panic");