Public bug reported:

Using the pcs package results in runaway ruby/pcsd processes that use
100% CPU (reported but ignored here:
https://bugs.launchpad.net/ubuntu/+source/pcs/+bug/1772998).  Strace
shows them stuck in a sched_yield() loop.  After more digging this seems
to a problem in the ruby interpreter, and was fixed in a patch discussed
here:  https://bugs.launchpad.net/ubuntu/+source/pcs/+bug/1772998

However it's still a problem in Ubuntu 16.04.

Can this fix please be backported to Ubuntu 16?

** Affects: pcs (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1783161

Title:
  Ruby processes get stuck on sched_yield busyloop

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