patacongo edited a comment on issue #1733:
URL:
https://github.com/apache/incubator-nuttx/issues/1733#issuecomment-688932789
>
>
> I have really no idea, my understanding of this part of NuttX is very
limited.
And my memory is very limited. People think that because I wrote most of
this code (at least originally), I should understand it all. That
KEEP_ALIVE_HACK was added by commit 6546fa39c7a way back in 2014 with this
commit:
commit 6546fa39c7a292e919d1ea396d67bea8242f2c4b
Author: Gregory Nutt <gn...@nuttx.org>
Date: Tue Aug 12 11:12:00 2014 -0600
Tickless Stuff: Back out the risky timer operations when the
ready-to-run list is modified.
That is unsafe. An ugly workaround is just to keep an interval
timer going all of the time
with a minimum duration equal to the timeslice interval.
That was after some attempts to use the timer interfaces in that context.
That commit is a good reference because it shows some of the non-viable code
that was removed. Commit 0d71260bf2d which added Sporadic support brought that
KEEP_ALIVE_HACK logic to its current state.
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