vmalloc()返回的地址是PAGE_SIZE的倍数吗？
Is the address returned by vmalloc() a multiple of PAGE_SIZE?
我想问一个关于 vmalloc() 的问题。
根据 kernel.org 的 documentation，它说：
Allocate enough pages to cover size from the page level allocator and map them into contiguous kernel virtual space.
这是否意味着 vmalloc() 返回的（起始）地址将是 PAGE_SIZE 的倍数？
以下是我的想法：
我试过调用vmalloc()并打印出十六进制地址。最后三位全为零，PAGE_SIZE 的值在我的系统上是 4096，这在某种程度上证明了我的假设。此外，在mmap()、
void *mmap(void *addr, size_t length, int prot, int flags,
int fd, off_t offset);
联机帮助页还说，
If addr is NULL, then the kernel chooses the (page-aligned)
address at which to create the mapping; this is the most portable
method of creating a new mapping. If addr is not NULL, then the
kernel takes it as a hint about where to place the mapping; on
Linux, the kernel will pick a nearby page boundary (but always
above or equal to the value specified by
/proc/sys/vm/mmap_min_addr) and attempt to create the mapping
there.
offset must be a multiple of the page size
A file is mapped in multiples of the page size.
以上似乎证明了我的假设，但我不太确定。如有任何想法，我们将不胜感激。
vmalloc分配页面，returns分配内存的起始地址。每个页面都必须页面对齐。因此起始地址是页面大小的倍数。
我想问一个关于 vmalloc() 的问题。
根据 kernel.org 的 documentation，它说：
Allocate enough pages to cover size from the page level allocator and map them into contiguous kernel virtual space.
这是否意味着 vmalloc() 返回的（起始）地址将是 PAGE_SIZE 的倍数？
以下是我的想法：
我试过调用vmalloc()并打印出十六进制地址。最后三位全为零，PAGE_SIZE 的值在我的系统上是 4096，这在某种程度上证明了我的假设。此外，在mmap()、
void *mmap(void *addr, size_t length, int prot, int flags,
int fd, off_t offset);
联机帮助页还说，
If addr is NULL, then the kernel chooses the (page-aligned) address at which to create the mapping; this is the most portable method of creating a new mapping. If addr is not NULL, then the kernel takes it as a hint about where to place the mapping; on Linux, the kernel will pick a nearby page boundary (but always above or equal to the value specified by /proc/sys/vm/mmap_min_addr) and attempt to create the mapping there.
offset must be a multiple of the page size
A file is mapped in multiples of the page size.
以上似乎证明了我的假设，但我不太确定。如有任何想法，我们将不胜感激。
vmalloc分配页面，returns分配内存的起始地址。每个页面都必须页面对齐。因此起始地址是页面大小的倍数。