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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Allow multiprocessing finalizers to run on a separate thread","articleBody":"# Feature or enhancement\r\n\r\n### Proposal:\r\n\r\nThe multiprocessing library allows finalizers to be attached to specific objects, so as to release system resources. These finalizers may have non-trivial code that rely on and alter global state.\r\n\r\nUnfortunately, since mainline code can be interrupted at any time by the GC, there can be rare reentrancy issues with such non-trivial finalizers, such as in gh-109593.\r\n\r\nIdeally, we would run such finalizers in a separate thread rather than from inside the GC.\r\n\r\nNote this is related to https://peps.python.org/pep-0556/, but much more focussed and therefore with a higher chance of success.\r\n\r\n### Has this already been discussed elsewhere?\r\n\r\nThis is a minor feature, which does not need previous discussion elsewhere\r\n\r\n### Links to previous discussion of this feature:\r\n\r\n_No response_\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-110510\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/pitrou","@type":"Person","name":"pitrou"},"datePublished":"2023-09-27T16:57:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/109978/cpython/issues/109978"}