-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Reid Kleckner wrote: > On Mon, Feb 1, 2010 at 5:18 PM, Jesse Noller <jnol...@gmail.com> wrote: >> I don't disagree there; but then again, I haven't seen this issue >> arise (in my own code)/no bug reports/no test cases that show this to >> be a consistent issue. I'm perfectly OK with being wrong, I'm just >> leery to tearing out the internals for something else "not forking". > > I'd appreciate it. It made my life a lot harder when trying to move > JIT compilation to a background thread, for exactly the reasons we've > been talking about. All the locks in the queue can be left in an > undefined state. I solved my problem by digging into the posix > module and inserting the code I needed to stop the background thread. > > Another problem with forking from a threaded Python application is > that you leak all the references held by the other thread's stack. > This isn't a problem if you're planning on exec'ing soon, but it's > something we don't usually think about. > > It would be nice if threads + multiprocessing worked out of the box > without people having to think about it. Using threads and fork > without exec is evil.
Yup, but that's true for *any* POSIXy envirnnment, not just Python. The only sane non-exec mixture is to have a single-thread parent fork, and restrict spawning threads to the children. Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 tsea...@palladion.com Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAktnXmUACgkQ+gerLs4ltQ7HvwCgibnpYbG2hSZUq7BbtUtQuXRu yJUAn19nh9yQ0hlBxa7tc3VviBbZ2sVn =VjKm -----END PGP SIGNATURE----- _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
