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c-user: Mention transitive priority inheritance

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Sebastian Huber 2019-04-10 09:30:52 +02:00
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c-user/key_concepts.rst
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@ -294,7 +294,10 @@ Priority Inheritance Protocol
The priority of the mutex owner is raised to the highest priority of all
threads that currently wait for ownership of this mutex :cite:`Sha:1990:PI`.
Since RTEMS 5.1, priority updates due to the priority inheritance protocol
take place immediately and are propagated recursively.
take place immediately and are propagated recursively. This means the priority
inheritance is transitive since RTEMS 5.1. If a task A owning a priority
inheritance mutex blocks on another priority inheritance mutex, then the owner
of this mutex inherits the priority of the task A.
.. index:: Multiprocessor Resource Sharing Protocol (MrsP)