staticinlinevoid*kmalloc_array(size_t n, size_t size, gfp_t flags) {if(size !=0&& n > SIZE_MAX /size)returnNULL;return__kmalloc(n *size, flags); } 绕了一圈,又是 kmalloc() 的封装。既然如此,就没有贴示例代码的必要了。 4、空间的释放 前面贴了三种内存空间申请的函数,它们在本质上都...
/** Patch up the size_index table if we have strange large alignment* requirements for the kmalloc array. This is only the case for* MIPS it seems. The standard arches will not generate any code here.** Largest permitted alignment is 256 bytes due to the way we* handle the index deter...
这是我的初始化代码: static __init int init_kmalloc(void) int size = sizeof(char*); char *buffer = kmalloc_arraylong l 浏览82提问于2021-05-06得票数 0 回答已采纳 2回答 Linux内核内存管理? 、、、 在模块发布后,Linux内核是否会释放kmalloc‘’ed而不是kfree在内核模块内存中,就像它使用用户...
1.kmalloc函数 static__always_inlinevoid*kmalloc(size_t size,gfp_t flags){if(__builtin_constant_p(size)){#ifndefCONFIG_SLOBunsignedintindex;#endifif(size>KMALLOC_MAX_CACHE_SIZE)returnkmalloc_large(size,flags);#ifndefCONFIG_SLOBindex=kmalloc_index(size);///查找使用的哪个slab缓冲区if(!index)r...
void *__kmalloc(size_t size, gfp_t flags) { struct kmem_cache *s; void *ret; if (unlikely(size > KMALLOC_MAX_CACHE_SIZE)) return kmalloc_large(size, flags); s = kmalloc_slab(size, flags); if (unlikely(ZERO_OR_NULL_PTR(s))) ...
void __init setup_kmalloc_cache_index_table(void) { ... for (i = 8; i < KMALLOC_MIN_SIZE; i += 8) { unsigned int elem = size_index_elem(i); if (elem >= ARRAY_SIZE(size_index)) break; size_index[elem] = KMALLOC_SHIFT_LOW; } ... } 结论:通过以上我们可以得出结论,在ARM...
static __init int init_kmalloc(void) { int size = sizeof(char*); char *buffer = kmalloc_array(loop_cnt, size, GFP_KERNEL); unsigned int i = 0; printk(KERN_DEBUG "Allocating %d times the memory size of %d\n", loop_cnt, alloc_size); ...
pages = __vmalloc(array_size, gfp_mask, PAGE_KERNEL);else/* __vmalloc 调用kmalloc为pages字段分配内存 */pages = kmalloc(array_size, (gfp_mask & ~__GFP_HIGHMEM)); area->pages = pages;/* 若分配失败,则清除内存区描述符,并返回NULL */if(!area->pages) { ...
struct stub40 *array40[SIZE] = {NULL}; %} function alloc_test() %{ int i; for (i = 0; i < SIZE; i ++) { array32[i] = kmalloc(sizeof(struct stub32), GFP_KERNEL); printk("32bytes [%d]:%p ", i, array32[i]);
array_size=(area->nr_pages*sizeof(structpage*)); //申请一个数组的物理内存对象,保存页描述符指针数组 area->pages=pages=kmalloc(array_size,GFP_KERNEL); if(!area_pages){ remove_vm_area(area->addr); kfree(area); returnNULL; } //将指针数组的元素清零。memset(area->pages,0,array_size);...