Re: s390 && user_enable_single_step() (Was: odd utrace testing results on s390x)

Oleg Nesterov
2010-01-05T17:03:20Z

On 01/05, Oleg Nesterov wrote:
>
> I'll add clear_bit(TIF_SINGLE_STEP) into do_fork() path and re-test.

Hmm. This patch

--- kernel/fork.c~ 2009-12-22 10:41:53.188084961 -0500
+++ kernel/fork.c 2010-01-05 11:42:58.370636323 -0500
@@ -1206,6 +1206,8 @@ static struct task_struct *copy_process(
* of CLONE_PTRACE.
*/
clear_tsk_thread_flag(p, TIF_SYSCALL_TRACE);
+ clear_tsk_thread_flag(p, TIF_SINGLE_STEP);
+ user_disable_single_step(p);
#ifdef TIF_SYSCALL_EMU
clear_tsk_thread_flag(p, TIF_SYSCALL_EMU);
#endif

doesn't help, I still see the same XXX's in dmesg...

Oleg.