From: Motohiro KOSAKI <redmine@...>
Date: 2010-06-23T21:54:13+09:00
Subject: [ruby-core:30872] [Bug #2553] Fix pthreads slowness by eliminating unnecessary sigprocmask calls

Issue #2553 has been updated by Motohiro KOSAKI.


I and nobu digged previous discussion awhile. Now, we have concluded getcontext() is only necessary when following cases
  1) Using linuxthreads (it has broken signal model)
  2) cpu arch has register stack

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http://redmine.ruby-lang.org/issues/show/2553

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