[Bug 209558] Wakeup only one thread while kqueue events are available

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209558

            Bug ID: 209558
           Summary: Wakeup only one thread while kqueue events are
                    available
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: andy.yx.chen at outlook.com

There is no reason to wakeup all threads while there are events available, as
that would make same event to be consumed by multiple threads at the same time
and result in errors.

a fix: https://github.com/freebsd/freebsd/pull/70

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