rlm_python

[Arran Cudbard-Bell]

> On 6 Apr 2016, at 10:57, Phil Mayers <p.mayers at imperial.ac.uk> wrote:
> 
> On 06/04/16 15:31, Arran Cudbard-Bell wrote:
>> Spent some time poking at it in v3.1.x.
>> 
>> It seems to work OK with multiple threads now, and i've reworked the
>> code to use separate interpreters for each module instance for
>> cleanliness.
> 
> This is a bit of a minefield.
> 
> C extension modules which are using the "simplified" GIL API will deadlock if accessed in anything other than the first interpreter, IIRC.

Wow...

> I also think you can run into problems with C extension modules and unloading if you destroy interpreters.
> 
> The mod_wsgi docs contain a few of the pitfalls:
> 
> https://code.google.com/archive/p/modwsgi/wikis/ApplicationIssues.wiki

Ew OK.

> It'll probably be fine for pure python, but it's very chancy with any C extension modules (which are the most interesting bits).

Do you have an example of using a C extension module that's likely to crash/deadlock?

Thanks,
-Arran

Arran Cudbard-Bell <a.cudbardb at freeradius.org>
FreeRADIUS Development Team

FD31 3077 42EC 7FCD 32FE 5EE2 56CF 27F9 30A8 CAA2

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