Doubt in importance of SCHEDULER_PRIORITY_APPEND

Sebastian Huber sebastian.huber at
Wed Jan 20 17:50:47 UTC 2021

On 20/01/2021 17:46, Joel Sherrill wrote:

> On Wed, Jan 20, 2021 at 1:50 AM Richi Dubey <richidubey at 
> <mailto:richidubey at>> wrote:
>     Appending an item to its priority group means adding the item to
>     the end of the priority queue of items with the same priority, but
>     when/why do we do this? Do all classic tasks have their
> There is (was) a specific case in the POSIX implementation that 
> required the thread to be placed at the head of the list. Hopefully it 
> is still there or all the Ada conformance tests will not pass. At 
> least, that was where I encountered code that depended on that very 
> precise behavior.
Yes, it is pthread_setschedprio(), however, the special case is that it 
is prepended to its priority group.

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