[RTEMS Project] #2751: Thread dispatch via interrupt is broken at least on ARM and PowerPC

[RTEMS trac]

#2751: Thread dispatch via interrupt is broken at least on ARM and PowerPC
-----------------------------+-----------------------------
 Reporter:  sebastian.huber  |      Owner:  sebastian.huber
     Type:  defect           |     Status:  new
 Priority:  normal           |  Milestone:  4.12
Component:  SMP              |    Version:  4.11
 Severity:  critical         |   Keywords:
-----------------------------+-----------------------------
 The ARM and PowerPC interrupt epilogues call _Thread_Dispatch() with
 interrupts disabled (counter example: SPARC).

 On SMP configurations, since inter-processor interrupts set the thread
 dispatch necessary indicator this prevents a thread dispatch notification
 in post-switch handlers (which all run with interrupts disabled).

 On all configurations, this is a serious issue for the interrupt latency.

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Ticket URL: <http://devel.rtems.org/ticket/2751>
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