:orphan:

.. title:: HEAP_MEM_POOL_SIZE

.. option:: CONFIG_HEAP_MEM_POOL_SIZE

*Heap memory pool size (in bytes)*

Type: ``int``

Help
====

.. code-block:: none

    This option specifies the size of the heap memory pool used when
    dynamically allocating memory using k_malloc(). The maximum size of
    the memory pool is only limited to available memory. A size of zero
    means that no heap memory pool is defined.

Direct dependencies
===================

\ :option:`DMA_MCUX_LPC <CONFIG_DMA_MCUX_LPC>` || \ :option:`DMA_MCUX_LPC <CONFIG_DMA_MCUX_LPC>` || (\ :option:`DMA_MCUX_LPC <CONFIG_DMA_MCUX_LPC>` && \ :option:`BOARD_MIMXRT685_EVK <CONFIG_BOARD_MIMXRT685_EVK>`) || (!\ :option:`TRUSTED_EXECUTION_SECURE <CONFIG_TRUSTED_EXECUTION_SECURE>` && (\ :option:`BOARD_THINGY53_NRF5340_CPUAPP <CONFIG_BOARD_THINGY53_NRF5340_CPUAPP>` || \ :option:`BOARD_THINGY53_NRF5340_CPUAPPNS <CONFIG_BOARD_THINGY53_NRF5340_CPUAPPNS>`)) || \ :option:`BT <CONFIG_BT>` || (\ :option:`USB <CONFIG_USB>` && \ :option:`SOC_FAMILY_SAM0 <CONFIG_SOC_FAMILY_SAM0>`) || (\ :option:`SOC_NRF5340_CPUAPP_QKAA <CONFIG_SOC_NRF5340_CPUAPP_QKAA>` && \ :option:`SOC_SERIES_NRF53X <CONFIG_SOC_SERIES_NRF53X>` && \ :option:`SOC_FAMILY_NRF <CONFIG_SOC_FAMILY_NRF>`) || (\ :option:`SOC_NRF5340_CPUNET_QKAA <CONFIG_SOC_NRF5340_CPUNET_QKAA>` && \ :option:`SOC_SERIES_NRF53X <CONFIG_SOC_SERIES_NRF53X>` && \ :option:`SOC_FAMILY_NRF <CONFIG_SOC_FAMILY_NRF>`) || \ :option:`BOARD_BL5340_DVK_CPUAPP <CONFIG_BOARD_BL5340_DVK_CPUAPP>` || \ :option:`BOARD_BL5340_DVK_CPUAPPNS <CONFIG_BOARD_BL5340_DVK_CPUAPPNS>` || \ :option:`BOARD_NRF5340DK_NRF5340_CPUAPP <CONFIG_BOARD_NRF5340DK_NRF5340_CPUAPP>` || \ :option:`BOARD_NRF5340DK_NRF5340_CPUAPPNS <CONFIG_BOARD_NRF5340DK_NRF5340_CPUAPPNS>` || \ :option:`KERNEL_MEM_POOL <CONFIG_KERNEL_MEM_POOL>`

*(Includes any dependencies from ifs and menus.)*

Defaults
========

- 4096
- 4096
- 4096
- 4096 if \ :option:`BT_RPMSG <CONFIG_BT_RPMSG>`
- 16384
- 1024
- 4096 if \ :option:`NRF_802154_SER_HOST <CONFIG_NRF_802154_SER_HOST>`
- 4096 if \ :option:`NRF_802154_SER_RADIO <CONFIG_NRF_802154_SER_RADIO>`
- 4096 if \ :option:`BT_RPMSG <CONFIG_BT_RPMSG>`
- 4096 if \ :option:`BT_RPMSG <CONFIG_BT_RPMSG>`
- 0 if !\ :option:`POSIX_MQUEUE <CONFIG_POSIX_MQUEUE>`
- 1024 if \ :option:`POSIX_MQUEUE <CONFIG_POSIX_MQUEUE>`

Kconfig definitions
===================



At ``<Zephyr Boards>/arm/lpcxpresso55s28/Kconfig.defconfig:39``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:18``

Menu path: (Top)

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 4096
    	depends on DMA_MCUX_LPC

----

At ``<Zephyr Boards>/arm/lpcxpresso55s69/Kconfig.defconfig:57``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:18``

Menu path: (Top)

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 4096
    	depends on DMA_MCUX_LPC

----

At ``<Zephyr Boards>/arm/mimxrt685_evk/Kconfig.defconfig:36``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:18``

Menu path: (Top)

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 4096
    	depends on DMA_MCUX_LPC && BOARD_MIMXRT685_EVK

----

At ``<Zephyr Boards>/arm/thingy53_nrf5340/Kconfig.defconfig:65``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:18``

Menu path: (Top)

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 4096 if BT_RPMSG
    	depends on !TRUSTED_EXECUTION_SECURE && (BOARD_THINGY53_NRF5340_CPUAPP || BOARD_THINGY53_NRF5340_CPUAPPNS)

----

At ``<Zephyr Boards>/xtensa/esp32/Kconfig.defconfig:22``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:18``

Menu path: (Top)

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 16384
    	depends on BT

----

At ``<Zephyr SoC>/arm/atmel_sam0/common/Kconfig.defconfig.series:49``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:19`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arm/atmel_sam0/Kconfig.defconfig:6``

Menu path: (Top)

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 1024
    	depends on USB && SOC_FAMILY_SAM0

----

At ``<Zephyr SoC>/arm/nordic_nrf/nrf53/Kconfig.defconfig.nrf5340_CPUAPP_QKAA:20``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:19`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arm/nordic_nrf/Kconfig.defconfig:8`` → ``<Zephyr SoC>/arm/nordic_nrf/nrf53/Kconfig.defconfig.series:8``

Menu path: (Top)

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 4096 if NRF_802154_SER_HOST
    	depends on SOC_NRF5340_CPUAPP_QKAA && SOC_SERIES_NRF53X && SOC_FAMILY_NRF

----

At ``<Zephyr SoC>/arm/nordic_nrf/nrf53/Kconfig.defconfig.nrf5340_CPUNET_QKAA:18``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:19`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arm/nordic_nrf/Kconfig.defconfig:8`` → ``<Zephyr SoC>/arm/nordic_nrf/nrf53/Kconfig.defconfig.series:8``

Menu path: (Top)

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 4096 if NRF_802154_SER_RADIO
    	depends on SOC_NRF5340_CPUNET_QKAA && SOC_SERIES_NRF53X && SOC_FAMILY_NRF

----

At ``<Zephyr Boards>/arm/bl5340_dvk/Kconfig:64``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr Boards>/Kconfig:57``

Menu path: (Top) → Board Options

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 4096 if BT_RPMSG
    	depends on BOARD_BL5340_DVK_CPUAPP || BOARD_BL5340_DVK_CPUAPPNS

----

At ``<Zephyr Boards>/arm/nrf5340dk_nrf5340/Kconfig:63``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr Boards>/Kconfig:57``

Menu path: (Top) → Board Options

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int
    	default 4096 if BT_RPMSG
    	depends on BOARD_NRF5340DK_NRF5340_CPUAPP || BOARD_NRF5340DK_NRF5340_CPUAPPNS

----

At ``<Zephyr Kernel>/Kconfig:513``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:30``

Menu path: (Top) → General Kernel Options → Other Kernel Object Options → Use Kernel Memory Pool

.. code-block:: kconfig

    config HEAP_MEM_POOL_SIZE
    	int "Heap memory pool size (in bytes)"
    	default 0 if !POSIX_MQUEUE
    	default 1024 if POSIX_MQUEUE
    	depends on KERNEL_MEM_POOL
    	help
    	  This option specifies the size of the heap memory pool used when
    	  dynamically allocating memory using k_malloc(). The maximum size of
    	  the memory pool is only limited to available memory. A size of zero
    	  means that no heap memory pool is defined.

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