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[3.12] gh-104372: Drop the GIL around the vfork() call. (GH-104782)#104942
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On Linux where the `subprocess` module can use the `vfork` syscall forfaster spawning, prevent the parent process from blocking other threadsby dropping the GIL while it waits for the vfork'ed child process `exec`outcome. This prevents spawning a binary from a slow filesystem fromblocking the rest of the application.FixespythonGH-104372.(cherry picked from commitd086792)Co-authored-by: Gregory P. Smith <gps@python.org>
This was referencedMay 25, 2023
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On Linux where the
subprocess
module can use thevfork
syscall forfaster spawning, prevent the parent process from blocking other threads
by dropping the GIL while it waits for the vfork'ed child process
exec
outcome. This prevents spawning a binary from a slow filesystem from
blocking the rest of the application.
FixesGH-104372.
(cherry picked from commitd086792)
Co-authored-by: Gregory P. Smithgps@python.org
📚 Documentation preview 📚:https://cpython-previews--104942.org.readthedocs.build/