pages = mmap(NULL, pageCount, PROT_READ | PROT_WRITE, mode, -1, 0); if(pages == MAP_FAILED) { printf(“Error mapping pages”); return -1; } sleep(2); // use the mapped pages if(munmap(pages, pageCount) == -1) {
*/ struct { struct rb_node rb; unsigned long rb_subtree_last; } shared; /* * A file's MAP_PRIVATE vma can be in both i_mmap tree and anon_vma * list, after a COW of one of the file pages. A MAP_SHARED vma * can only be in the i_mmap tree. An anonymous MAP_PRIVATE, ...
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* A file's MAP_PRIVATE vma can be in both i_mmap tree and anon_vma * list, after a COW of one of the file pages. A MAP_SHARED vma * can only be in the i_mmap tree. An anonymous MAP_PRIVATE, stack * or brk vma (with NULL file) can only be in an anon_vma list. */ /...
(Contig Pages) [VMA_MEM_ALLOC_TYPE] Pid: 2378 Tid: 2378 VMA DETAILS: Num of UC ARPs 3 [VMA_NEIGH_UC_ARP_QUATA] Pid: 2378 Tid: 2378 VMA DETAILS: UC ARP delay (msec) 10000 [VMA_NEIGH_UC_ARP_DELAY_MSEC] Pid: 2378 Tid: 2378 VMA DETAILS: Num of neigh restart retries 1 [VMA_...
(Contig Pages) [VMA_MEM_ALLOC_TYPE] Pid: 2378 Tid: 2378 VMA DETAILS: Num of UC ARPs 3 [VMA_NEIGH_UC_ARP_QUATA] Pid: 2378 Tid: 2378 VMA DETAILS: UC ARP delay (msec) 10000 [VMA_NEIGH_UC_ARP_DELAY_MSEC] Pid: 2378 Tid: 2378 VMA DETAILS: Num of neigh restart retries 1 [VMA_...
The first implementation, Stoakes said, is cautious and does not attempt to handle cases with longer anon_vma_chain lists. It relocates the VMA pgoff and the associated folio index fields regardless of whether it is able to merge the VMAs or not. Transparent huge pages are correctly handled...
使用vmaFindMemoryTypeIndex()等函数可查询符合特定需求的内存类型。若需分配与特定资源不绑定的设备内存，vmaAllocateMemory可用，但不推荐。vmaAllocateMemoryPages则支持创建多个设备内存，特别适用于稀疏绑定。若已创建资源，可使用vmaAllocateMemoryForBuffer()或vmaAllocateMemoryForImage()为其分配内存并绑定...
$ echo 800 > /proc/sys/vm/nr_hugepages Note: Increase the amount of shared memory (bytes) and Huge Pages if you receive a warning about insufficient number of huge pages allocated in the system. While VMA_MEM_ALLOC_TYPE=2 is set, VMA will attempt to allocate data buffers as Huge Page...
* list, after a COW of one of the file pages. A MAP_SHARED vma * can only be in the i_mmap tree. An anonymous MAP_PRIVATE, stack * or brk vma (with NULL file) can only be in an anon_vma list. */ /*anno_vma_node和annon_vma用于管理源自匿名映射的共享页*/ ...