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[3.14] gh-144513: Skip critical section locking during stop-the-world (gh-144524) - #145570
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…-world (pythongh-144524) When the interpreter is in a stop-the-world pause, critical sections don't need to acquire locks since no other threads can be running. This avoids a potential deadlock where lock fairness hands off ownership to a thread that has already suspended for stop-the-world. (cherry picked from commit 0fdf6a9)
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March 5, 2026 20:50
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March 5, 2026 21:56
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When the interpreter is in a stop-the-world pause, critical sections don't need to acquire locks since no other threads can be running. This avoids a potential deadlock where lock fairness hands off ownership to a thread that has already suspended for stop-the-world.