kernel: Make heap smallest object size configurable
Allow application to chose the size of the smallest object taken from
the heap.
Signed-off-by: Pawel Dunaj <pawel.dunaj@nordicsemi.no>
diff --git a/kernel/Kconfig b/kernel/Kconfig
index bcecfe7..513f394 100644
--- a/kernel/Kconfig
+++ b/kernel/Kconfig
@@ -485,6 +485,15 @@
dynamically allocating memory using k_malloc(). Supported values
are: 256, 1024, 4096, and 16384. A size of zero means that no
heap memory pool is defined.
+
+config HEAP_MEM_POOL_MIN_SIZE
+ int "The smallest blocks in the heap memory pool (in bytes)"
+ depends on HEAP_MEM_POOL_SIZE != 0
+ default 64
+ help
+ This option specifies the size of the smallest block in the pool.
+ Option must be a power of 2 and lower than or equal to the size
+ of the entire pool.
endmenu
config ARCH_HAS_CUSTOM_SWAP_TO_MAIN
diff --git a/kernel/mempool.c b/kernel/mempool.c
index 013947e..3c8c7c7 100644
--- a/kernel/mempool.c
+++ b/kernel/mempool.c
@@ -179,7 +179,8 @@
* that has the address of the associated memory pool struct.
*/
-K_MEM_POOL_DEFINE(_heap_mem_pool, 64, CONFIG_HEAP_MEM_POOL_SIZE, 1, 4);
+K_MEM_POOL_DEFINE(_heap_mem_pool, CONFIG_HEAP_MEM_POOL_MIN_SIZE,
+ CONFIG_HEAP_MEM_POOL_SIZE, 1, 4);
#define _HEAP_MEM_POOL (&_heap_mem_pool)
void *k_malloc(size_t size)
