Issue #4570 has been reported by Eric Wong.

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Feature #4570: [PATCH v2] io.c (rb_io_close): release GVL if possible
http://redmine.ruby-lang.org/issues/4570

Author: Eric Wong
Status: Open
Priority: Low
Assignee: Motohiro KOSAKI
Category: core
Target version: 1.9.x


v2 of this change should fix issue #4558 and
be cleaner than the original proposed fixes.

Also pushed to my repo: git pull git://bogomips.org/ruby io-close-nogvl2


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