[issue38888] Popen should use pidfd_create to implement a non-busy wait

[Роман Донченко]

New submission from Роман Донченко <dpb at corrigendum.ru>:

Popen.wait(timeout) is currently implemented on Unix-like systems using a busy wait, since the waitpid system call doesn't have a timeout argument.

On Linux, it's now possible to do better than that. You can create a PID file descriptor using pidfd_create and poll that descriptor with the specified timeout. Popen.wait should make use of that.

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components: Library (Lib)
messages: 357222
nosy: SpecLad
priority: normal
severity: normal
status: open
title: Popen should use pidfd_create to implement a non-busy wait
type: enhancement
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38888>
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