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kernel: dynamic: Optimize stack pool usage

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Add the flags parameter to the z_thread_stack_alloc_pool function.
Determine the maximum possible stack size based on the size of the reserved
memory for stack and the thread type (flags).

The stack size that can be used by a thread depend on its type
(kerner/user). For the same stack size, the macros K_KERNEL_STACK_DECLARE
and K_THREAD_STACK_DEFINE may reserve different amount of memory.

Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>
This commit is contained in:
Adrian Warecki
2025-05-22 14:33:38 +02:00
committed by Chris Friedt
parent 18497c57f1
commit 5c5e17f0f3
1 changed files with 7 additions and 6 deletions
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13
kernel/dynamic.c
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@@ -31,15 +31,16 @@ static K_THREAD_STACK_ARRAY_DEFINE(dynamic_stack, CONFIG_DYNAMIC_THREAD_POOL_SIZ
CONFIG_DYNAMIC_THREAD_STACK_SIZE);
SYS_BITARRAY_DEFINE_STATIC(dynamic_ba, BA_SIZE);
static k_thread_stack_t *z_thread_stack_alloc_pool(size_t size)
static k_thread_stack_t *z_thread_stack_alloc_pool(size_t size, int flags)
{
int rv;
size_t offset;
k_thread_stack_t *stack;
const size_t max_size = ((flags & K_USER) != 0) ? K_THREAD_STACK_SIZEOF(dynamic_stack[0]) :
K_KERNEL_STACK_SIZEOF(dynamic_stack[0]);
if (size > CONFIG_DYNAMIC_THREAD_STACK_SIZE) {
LOG_DBG("stack size %zu is > pool stack size %d", size,
CONFIG_DYNAMIC_THREAD_STACK_SIZE);
if (size > max_size) {
LOG_DBG("stack size %zu is > pool stack size %zu", size, max_size);
return NULL;
}
@@ -79,11 +80,11 @@ k_thread_stack_t *z_impl_k_thread_stack_alloc(size_t size, int flags)
if (IS_ENABLED(CONFIG_DYNAMIC_THREAD_PREFER_ALLOC)) {
stack = z_thread_stack_alloc_dyn(size, flags);
if (stack == NULL && CONFIG_DYNAMIC_THREAD_POOL_SIZE > 0) {
stack = z_thread_stack_alloc_pool(size);
stack = z_thread_stack_alloc_pool(size, flags);
}
} else if (IS_ENABLED(CONFIG_DYNAMIC_THREAD_PREFER_POOL)) {
if (CONFIG_DYNAMIC_THREAD_POOL_SIZE > 0) {
stack = z_thread_stack_alloc_pool(size);
stack = z_thread_stack_alloc_pool(size, flags);
}
if ((stack == NULL) && IS_ENABLED(CONFIG_DYNAMIC_THREAD_ALLOC)) {