When does ktsan task destroy?

[zizhiyoumu-fuzz]

While testing , I found sometimes ktsan task is not destroy.At this time, task state is TASK_DEAD, but not enter finish_task_switch function.After adding some log, I found during context switch, task is switch.Why?When does ktsan task destroy?

[anatol]

The ktsan task data structures are cleaned up (destroyed) by ktsan_task_destroy function. Please check its implementation.

This function is called in finish_task_switch in case if the process is in DEAD state and its context need to be cleaned up.

Does it answer you question?

[zizhiyoumu-fuzz]

The function finish_task_switch I can found.But I find that in finish_task_switch function, it's unlikely prev_state is TASK_DEAD.When I fork and exit processes frequently, the ktsan_task_destroy is slower than create, the maximum number of threads is reached。How can I deal with it?