net: mgmt: Use proper coop thread priority value #32384
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If user sets CONFIG_NUM_PREEMPT_PRIORITIES=0, then the priority of the net_mgmt thread will be -1 which is the same as idle thread. This will trigger assert in kernel as then the minimum coop priority is -2 in this case. Remove the net_mgmt thread priority setting from Kconfig file as it is low value and set the coop thread priority the same way as other network threads are doing it. Fixes zephyrproject-rtos#32375 Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
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| k_thread_create(&mgmt_thread_data, mgmt_stack, | ||
| K_KERNEL_STACK_SIZEOF(mgmt_stack), | ||
| (k_thread_entry_t)mgmt_thread, NULL, NULL, NULL, | ||
| CONFIG_NET_MGMT_EVENT_THREAD_PRIO, 0, K_NO_WAIT); | ||
| THREAD_PRIORITY, 0, K_NO_WAIT); |
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There is a predefined K_LOWEST_APPLICATION_THREAD_PRIO in include/kernel.h which could be used here. The define is used by e.g. logger subsystem.
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I did this change same way as the other networking threads are done so not using this define. The name of the define talks about application and we have no applications here but a thread which is part of a subsystem. But it is certainly possible to use that define if needed, but I would do that change in a separate PR if we really want to do it.
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From the kernel perspective subsystem is an application. There is no thread priority range that is reserved for subsystems. So the name K_LOWEST_APPLICATION_THREAD_PRIO carries in fact the right meaning. Though I agree that seeing such a define in a networking stack might be confusing. From the user perspective subsystem is certainly not an application. Using the define was just a suggestion.
If user sets CONFIG_NUM_PREEMPT_PRIORITIES=0, then the priority
of the net_mgmt thread will be -1 which is the same as idle thread.
This is will assert in kernel as then the minimum coop priority is -2
in this case. Remove the net_mgmt thread priority setting from
Kconfig file as it is low value and set the coop thread priority
the same way as other network threads are doing it.
Fixes #32375
Signed-off-by: Jukka Rissanen jukka.rissanen@linux.intel.com