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GeezerVison is showing github.com — Disable the GIL by default in free-threaded builds · Issue #116329 · python/cpython

Disable the GIL by default in free-threaded builds #116329

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Disable the GIL by default in free-threaded builds#116329
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colesbury
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interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)topic-free-threadingtype-featureA feature request or enhancementA feature request or enhancement

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@swtaarrs
swtaarrs
opened on Mar 4, 2024
Issue body actions

Feature or enhancement

Proposal:

Once #116167 is complete, users will be able to disable the GIL with PYTHON_GIL=0, but the GIL will remain enabled by default.

When we have enough confidence in the correctness of running without the GIL, we should change free-threaded builds to disable the GIL by default, as described in PEP 703.

This should be a very small code change, and is already detailed in this comment.

Reacted by Erlend E. Aasland, Donghee Na and Juhan Oskar Hennoste

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  1. swtaarrs
    added
    type-featureA feature request or enhancementA feature request or enhancement
    interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)
    topic-free-threading
    on Mar 4, 2024

  2. corona10 commented on Mar 5, 2024

    @corona10
    corona10
    on Mar 5, 2024
    Member
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    From my view, at least we should pass all unit tests with PYTHON_GIL=0

    Reacted by Brett Simmers, Ferdinand Bachmann and cloudyd3
  3. swtaarrs
    assigned
    colesbury
    on Apr 26, 2024

  4. colesbury commented on Apr 26, 2024

    @colesbury
    colesbury
    on Apr 26, 2024
    Contributor
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    Done in #118295

    Reacted by Itamar Oren and Danijar Hafner
    Reacted by Danijar Hafner
  5. colesbury
    closed this as completedon Apr 26, 2024

  6. colesbury commented on Nov 24, 2025

    @colesbury
    colesbury
    on Nov 24, 2025
    Contributor
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    Combining with:

    • Disable GIL by default in free-threaded build #116749
  7. colesbury
    closed this as a duplicateof Disable GIL by default in free-threaded build #116749 on Nov 24, 2025
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  • @colesbury
    colesbury

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interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)topic-free-threadingtype-featureA feature request or enhancementA feature request or enhancement

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