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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| .. | ||
| gen_offset.h | ||
| kernel_internal.h | ||
| kernel_offsets.h | ||
| kernel_structs.h | ||
| ksched.h | ||
| kswap.h | ||
| offsets_short.h | ||
| syscall_handler.h | ||
| timeout_q.h | ||
| wait_q.h | ||