rt-thread/components/drivers/ipc/Kconfig

menuconfig RT_USING_DEVICE_IPC
    bool "Using device drivers IPC"
    default y
    select RT_USING_MUTEX
    select RT_USING_SEMAPHORE
    help
      Enable the device-layer IPC helpers (pipes, message queues, workqueues)
      that many drivers rely on for buffering and deferred processing. Disable
      only on extremely small systems that do not load drivers needing mutex or
      semaphore-based IPC primitives.

if RT_USING_DEVICE_IPC
    config RT_UNAMED_PIPE_NUMBER
        int "The number of unamed pipe"
        default 64
        help
          Maximum number of anonymous pipes that can be created at runtime.
          Reduce this to save memory if your application uses few pipes.

    config RT_USING_SYSTEM_WORKQUEUE
        bool "Using system default workqueue"
        default n
        help
          Create a global system workqueue thread so drivers can defer work out
          of interrupt context without allocating their own threads.

    if RT_USING_SYSTEM_WORKQUEUE
        config RT_SYSTEM_WORKQUEUE_STACKSIZE
            int "The stack size for system workqueue thread"
            default 2048
            help
              Stack size in bytes for the common workqueue thread; increase when
              queued jobs perform complex tasks or call into heavy subsystems.

        config RT_SYSTEM_WORKQUEUE_PRIORITY
            int "The priority level of system workqueue thread"
            default 23
            help
              Scheduler priority assigned to the workqueue thread. Lower numbers
              mean higher priority; adjust relative to other timing-sensitive
              threads in your system.
    endif
endif