gh-104372: Drop the GIL around the vfork() call. #104782
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On Linux where the `subprocess` module can use the `vfork` syscall for faster 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. Fixes python#104372.
Don't write to the vfork_tstate_save pointer local after vfork.
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All commit authors signed the Contributor License Agreement. |
Yhg1s
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May 24, 2023
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Thanks @gpshead for the PR 🌮🎉.. I'm working now to backport this PR to: 3.11, 3.12. |
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Sorry, @gpshead, I could not cleanly backport this to |
miss-islington
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May 25, 2023
On Linux where the `subprocess` module can use the `vfork` syscall for faster 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. Fixes pythonGH-104372. (cherry picked from commit d086792) Co-authored-by: Gregory P. Smith <gps@python.org>
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GH-104942 is a backport of this pull request to the 3.12 branch. |
gpshead
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May 25, 2023
…104942) gh-104372: Drop the GIL around the vfork() call. (GH-104782) On Linux where the `subprocess` module can use the `vfork` syscall for faster 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. Fixes GH-104372. (cherry picked from commit d086792) Co-authored-by: Gregory P. Smith <gps@python.org>
gpshead
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May 26, 2023
On Linux where the `subprocess` module can use the `vfork` syscall for faster 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. Fixes python#104372. (cherry picked from commit d086792)
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GH-104958 is a backport of this pull request to the 3.11 branch. |
gpshead
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Sep 1, 2023
…04958) gh-104372: Drop the GIL around the vfork() call. (#104782) On Linux where the `subprocess` module can use the `vfork` syscall for faster 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. Fixes #104372. (cherry picked from commit d086792)
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On Linux where the
subprocessmodule can use thevforksyscall for faster spawning, prevent the parent process from blocking other threads by dropping the GIL while it waits for the vfork'ed child processexecoutcome. This prevents spawning a binary from a slow filesystem from blocking the rest of the application.Fixes #104372.
vfork()until the child processexec()succeeds or fails. #104372