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+Sat Mar 16 03:36:56 2013  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* thread.c (ruby_kill): release GVL while waiting signal delivered.
+
 Tue Mar 19 19:50:48 2013  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* ruby_kill (internal.h, thread.c): use rb_pid_t instead of pid_t.