On Fri, Mar 20, 2015 at 08:09:14PM +0100, Oleg Nesterov wrote: > On 03/20, Thiago Macieira wrote: > > > > On Friday 20 March 2015 19:14:04 Oleg Nesterov wrote: > > > Also. I forgot that the kernel always resets ->exit_signal to SIGCHLD on > > > exec or reparenting. Reparenting is probably fine. But what about exec? > > > Should it keep ->exit_signal == 0 if "autoreap" ? I think it should not, > > > to > > > avoid the strange special case. > > > > Not delivering any signal was the objective of this patch series, so yes > > exit_signal == 0 should survive an exec and even re-exec. > > OK, but then perhaps we should never send SIGCHLD (on exit) if "autoreap", > to make the logic simple. > > And copy_process() should probably do > > if ((clone_flags & CSIGNAL) && (clone_flags && CLONE_AUTOREAP)) > return -EINVAL; > > so that we still can change this behaviour later.
I'm fine with that, as it would handle the particular use case we care about. However, the reset-signal-on-reparent thing might still make sense, particularly for the ptrace-reparent case (less so for the reparent-to-child-reaper case). - Josh Triplett -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
