Message334345
Issue #34663 contains some earlier discussion about vfork, in the context of supporting a specific posix_spawn flag on Linux.
W.r.t. closing all file descriptors > 2: posix_spawn_file_actions_addclose can do this when using posix_spawn. That would have a performance cost, you'd basically have to resort to closing all possible file descriptors and cannot use the smarter logic used in _posixsubprocess. However, the smarter closing code in _posixsubprocess is not safe w.r.t. vfork according to the comment above _close_open_fds_maybe_unsafe: that function uses some functions that aren't async-safe and one of those calls malloc. |
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Date |
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2019-01-25 07:41:53 | ronaldoussoren | set | recipients:
+ ronaldoussoren, gregory.p.smith, vstinner, izbyshev, pablogsal |
2019-01-25 07:41:52 | ronaldoussoren | set | messageid: <1548402112.47.0.406024778106.issue35823@roundup.psfhosted.org> |
2019-01-25 07:41:52 | ronaldoussoren | link | issue35823 messages |
2019-01-25 07:41:52 | ronaldoussoren | create | |
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