<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 21, 2022 at 12:53 AM Sebastian Huber <<a href="mailto:sebastian.huber@embedded-brains.de">sebastian.huber@embedded-brains.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello Gedare and Joel,<br>
<br>
On 15.07.22 10:43, Sebastian Huber wrote:<br>
> The uniprocessor schedulers had some special case logic for the<br>
> PRIORITY_PSEUDO_ISR priority. Tasks with a priority of PRIORITY_PSEUDO_ISR<br>
> were allowed to preempt a not preemptible task. If other higher priority task<br>
> are made ready while a PRIORITY_PSEUDO_ISR task preempts a not preemptible<br>
> task, then the other tasks run before the not preemptible task. This made the<br>
> RTEMS_NO_PREEMPT mode ineffective.<br>
> <br>
> Remove the PRIORITY_PSEUDO_ISR special case logic. This simplifies the<br>
> uniprocessor schedulers. Move the uniprocessor-specific scheduler support to<br>
> the new header file <rtems/score/scheduleruniimpl.h>.<br>
> <br>
> Close #2365.<br></blockquote><div><br></div><div>I'm guessing that PRIORITY_PSEUDO_ISR wasn't used outside RTEMS itself</div><div>and likely only historically for the Timer Server Thread. The protection for that</div><div>thread was reworked as part of the SMP efforts. If it is used outside RTEMS, </div><div>that would be a user facing breakage and should be documented. </div><div><br></div><div>If you think all the use cases of PRIORITY_PSEUDO_ISR are accounted for,</div><div>I'm ok with removing it.</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
what is your opinion with respect to this change? It is the second last <br>
item on my score TODO list. The last item is:<br>
<br>
<a href="https://lists.rtems.org/pipermail/devel/2022-July/072534.html" rel="noreferrer" target="_blank">https://lists.rtems.org/pipermail/devel/2022-July/072534.html</a></blockquote><div><br></div><div>I'll try to look at that today. </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
<br>
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