[issue36139] release GIL on mmap dealloc

[Inada Naoki]

Inada Naoki <songofacandy at gmail.com> added the comment:

Your patch is modifying obmalloc.
It uses MAP_PRIVATE|MAP_ANONYMOUS mmap.
Does it really take log time?  How?

#1572968 is different.  It is mmap module.  It can use file-backed mmap.  It is I/O.

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nosy: +inada.naoki

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