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Title: [3.13] gh-135871: Fix needless spinning in `_PyMutex_LockTimed` with zero timeout (gh-135872) by colesbury · Pull Request #135947 · python/cpython · GitHub

Open Graph Title: [3.13] gh-135871: Fix needless spinning in `_PyMutex_LockTimed` with zero timeout (gh-135872) by colesbury · Pull Request #135947 · python/cpython

X Title: [3.13] gh-135871: Fix needless spinning in `_PyMutex_LockTimed` with zero timeout (gh-135872) by colesbury · Pull Request #135947 · python/cpython

Description: The free threading build could spin unnecessarily on _Py_yield() if the initial compare and swap failed. (cherry picked from commit cbfaf41) Issue: gh-135871

Open Graph Description: The free threading build could spin unnecessarily on _Py_yield() if the initial compare and swap failed. (cherry picked from commit cbfaf41) Issue: gh-135871

X Description: The free threading build could spin unnecessarily on _Py_yield() if the initial compare and swap failed. (cherry picked from commit cbfaf41) Issue: gh-135871

Opengraph URL: https://github.com/python/cpython/pull/135947

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697bdf5 [3.13] Fix needless spinning in `_PyMutex_LockTimed` with zero timeou… jtibbertsma Jun 25, 2025 https://github.com/python/cpython/pull/135947/commits/697bdf55b21f787500a61796478067a27052f005
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