On Fri, 2017-11-03 at 17:14 +0800, oulijun wrote: > unhandled level 2 translation fault (11) at 0x00000000, esr 0x92000006, in librdmacm.so.1.1.11 > [ffff9a6e8000+11000] Is this perhaps a user space fault reported by the kernel? From kernel source file arch/arm64/mm/fault.c: pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x", tsk->comm, task_pid_nr(tsk), inf->name, sig, addr, esr); You will need to identify what code in librdmacm caused this fault by using tools that report a stack trace for the fault. Had you already considered to run the application that uses librdmacm and that triggers this fault under gdb or valgrind? Bart.��.n��������+%������w��{.n�����{���fk��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f