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GeezerVison is showing github.com — [3.11] gh-90622: Do not spawn ProcessPool workers on demand via fork method. (GH-91598) by miss-islington · Pull Request #92495 · python/cpython

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@miss-islington

@miss-islington miss-islington commented May 8, 2022 •
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Do not spawn ProcessPool workers on demand when they spawn via fork.

This avoids potential deadlocks in the child processes due to forking from
a multithreaded process.
(cherry picked from commit ebb37fc)

Co-authored-by: Gregory P. Smith [email protected]

Automerge-Triggered-By: GH:gpshead

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@gpshead @miss-islington
pythongh-90622: Do not spawn ProcessPool workers on demand via fork m…
6f08a59 
…ethod. (pythonGH-91598)

Do not spawn ProcessPool workers on demand when they spawn via fork.

This avoids potential deadlocks in the child processes due to forking from
a multithreaded process.
(cherry picked from commit ebb37fc)

Co-authored-by: Gregory P. Smith <[email protected]>
@miss-islington

miss-islington commented May 8, 2022

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@gpshead: Status check is done, and it's a success ✅ .
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@bedevere-bot bedevere-bot mentioned this pull request May 8, 2022
gh-90622: Do not spawn ProcessPool workers on demand via fork method. #91598
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@miss-islington

miss-islington commented May 8, 2022

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@gpshead: Status check is done, and it's a success ✅ .
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@bedevere-bot bedevere-bot added type-bug An unexpected behavior, bug, or error awaiting review labels May 8, 2022
gpshead
gpshead approved these changes May 8, 2022
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@bedevere-bot bedevere-bot added awaiting merge and removed awaiting review labels May 8, 2022
@gpshead gpshead added the 🤖 automerge label May 8, 2022
@gpshead gpshead self-assigned this May 8, 2022
@gpshead
gpshead merged commit 4270b79 into python:3.11 May 8, 2022
@bedevere-bot bedevere-bot removed the awaiting merge label May 8, 2022
@miss-islington
miss-islington deleted the backport-ebb37fc-3.11 branch May 8, 2022 17:14
@miss-islington

miss-islington commented May 8, 2022

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@gpshead: Status check is done, and it's a success ✅ .
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@gpshead gpshead linked an issue May 8, 2022 that may be closed by this pull request
concurrent.futures.ProcessPoolExecutor can deadlock when tcmalloc is used #90622
Closed
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concurrent.futures.ProcessPoolExecutor can deadlock when tcmalloc is used

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@miss-islington @gpshead @bedevere-bot
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