What is priority inversion ? and What is the solution ?
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Answer Posted / banavathvishnu
priority
Task A----> 3
Task B----> 2
Task C----> 1
If Task A is holding the semaphore and executing and mean
while Task C occurs and if it is waiting for same Semaphore
Task A is holding, Task C has to wait untill Task A is done
with the resources and release semaphore.
Mean while if Task B is occured which doesnot require the
semaphore, then Task A will be in Ready state and Task B
will execute, after Task B is done, control goes to Task A,
till Task A completes its work Task C even though has
highest priority it has to wait for the semaphore to
release.
This is a problem in RTOS and can be resolved using
Priority Inheritance
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