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On 06/01/2017 01:41 AM, Larry Hastings wrote:

On 06/01/2017 01:19 AM, Antoine Pitrou wrote:

malloc() you said? Arenas are allocated using mmap() nowadays, right?

malloc() and free(). See \_PyObject\_ArenaMalloc (etc) in Objects/obmalloc.c.

Oh, sorry, I forgot how to read. If ARENAS\_USE\_MMAP is on it uses mmap(). I can't figure out when or how MAP\_ANONYMOUS gets set,

but if I step into the \_PyObject\_Arena.alloc() it indeed calls \_PyObject\_ArenaMmap() which uses mmap(). So, huzzah!, we use mmap() to allocate our enormous 256kb arenas.


/arry

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