fdescfs is no longer necessary

[asomers]

iocage's documentation recommends mounting fdescfs on the host to workaround a well-known Python performance bug: closing all file descriptors in between fork and exec one at a time takes forever.

However, Python has now finally fixed the bug the correct way! If you use FreeBSD's Python packages, the minimum versions containing the fix are 3.8.1_2, 3.7.5_1, 3.6.9_1, 3.5.9_3, or 2.7.17_1 . All of the ports in FreeBSD's ports tree, in both head and the last two quarterly branches, include the fix. So it's safe to say that any user with an up-to-date Python version no longer needs fdescfs to use iocage. I think you should remove it from the documentation.

See also:

• Performance Issue #514 (iocage bug report)
• https://svnweb.freebsd.org/ports?view=revision&revision=518640 applied the patch to FreeBSD's Python packages
• python/cpython@162c567 applied the patch to the main Python repository.

[igalic]

whoah!
thank you for this report