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Subject: [Bug 209558] [request] Wakeup only one thread while kqueue events
 are available
Date: Sun, 22 May 2016 18:45:25 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209558

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Closed
         Resolution|---                         |Works As Intended

--- Comment #4 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to Jilles Tjoelker from comment #3)
Such program must not use single kqueue for several threads, if the desire =
is
to avoid the thundering herd issue.

More important is that socket events are level triggered, i.e. readiness of=
 the
listen socket must be reported until the incoming connection is consumed.  =
So
the program behaviour is as intended.  Change of wakeup(9) to wakeup_one(9)
hides userspace bug, you just do not get all _required_ notifications since
less threads are runnable.

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