[RTEMS Project] #4532: Priority inversion issues with MrsP locking protocol implementation

[RTEMS trac]

#4532: Priority inversion issues with MrsP locking protocol implementation
------------------------------+--------------------------------
  Reporter:  Sebastian Huber  |      Owner:  Sebastian Huber
      Type:  defect           |     Status:  assigned
  Priority:  normal           |  Milestone:  6.1
 Component:  score            |    Version:  5
  Severity:  critical         |   Keywords:  SMP, qualification
Blocked By:                   |   Blocking:
------------------------------+--------------------------------
 While a thread is scheduled on a helping scheduler, while it does not own
 a MrsP semaphore, if it obtains a MrsP semaphore, then no scheduler node
 using an idle thread and the ceiling priority of the semaphore is
 unblocked for the home scheduler. This could lead to priority inversion
 issues and is not in line with the MrsP protocol.

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Ticket URL: <http://devel.rtems.org/ticket/4532>
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