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Gregory Nutt 2016-11-19 13:23:15 -06:00
parent a2aba90252
commit 6a7619b6f0
2 changed files with 31 additions and 2 deletions
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31
TODO
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@ -1,4 +1,4 @@
NuttX TODO List (Last updated November 17, 2016)
NuttX TODO List (Last updated November 19, 2016)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This file summarizes known NuttX bugs, limitations, inconsistencies with
@ -304,6 +304,35 @@ o Task/Scheduler (sched/)
Priority: Low. Things are just the way that we want them for the way
that NuttX is used today.
Title: SMP ISSUES
Description: The interface task_restart() (and probably task_delete()) are
not usable in the SMP configuration in the current design. In
the non-SMP case, these are relatively simple: If the task is
are not restarting/deleting itself, then the task to-be-restarted/
deleted is is supended and the restart/delete operation is a
simple operation on data structures.
In the SMP configuration, on the other hand, the task to be
restarted/deleted my in fact be executing concurrently on
another CPU and the existing logic cannot support those
operations on the running another CPU.
There might be a simple way to handler this; perhaps using
up_cpu_pause(), you could pause all of the other CPUs, perform
the restart/delete operation, then restart all other CPUs. But
this seems like a lot of work to support some garbage interfaces
that really should be removed anyway. These are unsafe, non-
standard interfaces that really have no place in an RTOS (unsafe
because you don't know what resources were held by the task when
it was restarted or deleted).
NOTE: Currently task_restart() is not even built if CONFIG_SMP=y.
The task_restart() test is also disabled in apps/examples/ostest
in this configuration. task_delete(), on the other hand, is
built (but probably should not be).
Status: Open
Priority: Low. I do not plan to do anything with this in the near future.
o Memory Management (mm/)
^^^^^^^^^^^^^^^^^^^^^^^

2
include/nuttx/irq.h
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@ -163,6 +163,6 @@ void leave_critical_section(irqstate_t flags);
#ifdef __cplusplus
}
#endif
#endif
#endif /* __ASSEMBLY__ */
#endif /* __INCLUDE_NUTTX_IRQ_H */