关于address_space的一个问题

linuxfellow

怎么是不同概念呢？
address_space 就是所谓地址空间， 无论是 mapping的 file， 还是 mapping 的 swa ...
zylthinking 发表于 2011-12-01 12:05

谢谢zylthinking
anonymous vma是没有链接到任何address_space,直接backed by swap space:

struct vm_area_struct {
struct mm_struct *vm_mm; // descriptor of VAS
unsigned long vm_start, vm_end; // of this region
pgprot_t vm_page_prot; // protection attributes for this region
short vm_avl_height;
struct vm_avl_left;
vm_area_struct *vm_avl_permission;  // right hand child
vm_area_struct * vm_next_share, *vm_prev_share; // doubly linked
vm_operations_struct *vm_ops;  
struct inode *vm_inode;  // of file mapped, or NULL = “anonymous mapping”
unsigned long vm_offset; // offset in file/device
}

anonymous mapping:  inode is NULL

linuxfellow

抱歉，zylthinking， 你是对的。
anonymous page最后map到struct address_space swapper_space