:orphan:

.. title:: PRINTK_SYNC

.. option:: CONFIG_PRINTK_SYNC

*Serialize printk() calls*

Type: ``bool``

Help
====

.. code-block:: none

    When true, a spinlock will be taken around the output from a
    single printk() call, preventing the output data from
    interleaving with concurrent usage from another CPU or an
    preempting interrupt.

Default
=======

- y if \ :option:`SMP <CONFIG_SMP>` && \ :option:`MP_NUM_CPUS <CONFIG_MP_NUM_CPUS>` > 1

Kconfig definition
==================



At ``<Zephyr Library>/os/Kconfig:54``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:33`` → ``<Zephyr Library>/Kconfig:10``

Menu path: (Top) → Additional libraries → OS Support Library

.. code-block:: kconfig

    config PRINTK_SYNC
    	bool "Serialize printk() calls"
    	default y if SMP && MP_NUM_CPUS > 1
    	help
    	  When true, a spinlock will be taken around the output from a
    	  single printk() call, preventing the output data from
    	  interleaving with concurrent usage from another CPU or an
    	  preempting interrupt.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*