From: Eric Wong <normalperson@...>
Date: 2018-07-25T08:20:49+00:00
Subject: [ruby-core:88102] Re: [Ruby trunk Misc#14937] [PATCH] thread_pthread: lazy-spawn timer-thread only on contention

Koichi Sasada <ko1@atdot.net> wrote:
> I need to read your proposal with more concentrations, but one thing:

Thanks.  I noticed a bug where it sometimes still get
stuck when I run "make exam" in a loop.  Will have to dig deeper
to solve...  (this is a tricky change :x)

> On 2018/07/25 8:48, normalperson@yhbt.net wrote:
> > Mutex#sleep resumes on spurious wakeups and
> 
> I think `Mutex#sleep` should care about spurious wakeups, shouldn't?

I don't know, current behavior seems intentional and documented
in RDoc:

     * Note that this method can wakeup without explicit Thread#wakeup call.
     * For example, receiving signal and so on.
     */

I don't know the reasoning behind it, maybe matz does.

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