远程直接内存访问（RDMA）中的内存保护

Question

假设我有一个进程，可以使用LOCAL WRITE权限注册一块RDMA可访问的内存。

另一个（本地）随机进程是否具有对该段物理内存的写入权限？

Answer 1

No, only queue pairs that were created with the same protection domain (PD) as the MR can access it. Since another random process cannot use your process's PD, it also cannot use your MR.