[issue20494] Backport of http://bugs.python.org/issue11849 to Python 2.7 (Make it more likely for the system allocator to release free()d memory arenas on glibc-based systems).

[Roundup Robot]

Roundup Robot added the comment:

New changeset 4e43e5b3f7fc by Benjamin Peterson in branch '2.7':
mmap obmalloc arenas so that they may be immediately returned to the system 
when unused (closes #20494)
http://hg.python.org/cpython/rev/4e43e5b3f7fc

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nosy: +python-dev
resolution:  -> fixed
stage:  -> committed/rejected
status: open -> closed

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<http://bugs.python.org/issue20494>
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