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https://github.com/zephyrproject-rtos/zephyr
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eace1df539
Recent changes post-scheduler-rewrite broke scheduling on SMP: The "preempt_ok" feature added to isolate preemption points wasn't honored in SMP mode. Fix this by adding a "swap_ok" field to the CPU record (not the thread) which is set at the same time out of update_cache(). The "queued" flag wasn't being maintained correctly when swapping away from _current (it was added back to the queue, but the flag wasn't set). Abstract out a "should_preempt()" predicate so SMP and uniprocessor paths share the same logic, which is distressingly subtle. There were two places where _Swap() was predicated on _get_next_ready_thread() != _current. That's no longer a benign optimization in SMP, where the former function REMOVES the next thread from the queue. Just call _Swap() directly in SMP, which has a unified C implementation that does this test already. Don't change other architectures in case it exposes bugs with _Swap() switching back to the same thread (it should work, I just don't want to break anything). Signed-off-by: Andy Ross <andrew.j.ross@intel.com> |
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| .. | ||
| include | ||
| alert.c | ||
| atomic_c.c | ||
| CMakeLists.txt | ||
| compiler_stack_protect.c | ||
| device.c | ||
| errno.c | ||
| idle.c | ||
| init.c | ||
| int_latency_bench.c | ||
| Kconfig | ||
| Kconfig.event_logger | ||
| Kconfig.power_mgmt | ||
| mailbox.c | ||
| mem_domain.c | ||
| mem_slab.c | ||
| mempool.c | ||
| msg_q.c | ||
| mutex.c | ||
| pipes.c | ||
| poll.c | ||
| queue.c | ||
| sched.c | ||
| sem.c | ||
| smp.c | ||
| stack.c | ||
| sys_clock.c | ||
| system_work_q.c | ||
| thread_abort.c | ||
| thread.c | ||
| timer.c | ||
| userspace_handler.c | ||
| userspace.c | ||
| version.c | ||
| work_q.c | ||