On 07/16, Eric W. Biederman wrote: > > There are two questions. > a) Can we use the pid of a thread to find the thread group? > b) Will the signal be queued in the thread group?
IMO "yes" to both questions, I simply see no reason to change the current semantics. Even if glibc doesn't show the tread id's a user can see them in /proc/$tgid/task/. So I think kill_pid_info() should just do p = pid_task(pid, PIDTYPE_PID); group_send_sig_info(p, PIDTYPE_TGID); again, posix_timer_event() looks fine, but to me pid_task(timr->it_pid, shared ? PIDTYPE_TGID : PIDTYPE_PID) looks like unnecessary complication, pid_task(timr->it_pid, PIDTYPE_PID); should do the same thing. And, I didn't mention this yesterday, but probably the next 08/11 patch can have the same problem. But this is a bit more complicated because send_sigio() uses the same "type" both for do_each_pid_task() and as an argument passed to do_send_sig_info(). Oleg.