Issue #4570 has been reported by Eric Wong. ---------------------------------------- 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 -- http://redmine.ruby-lang.org