Re: [PATCH 6/6] clone4: Introduce new CLONE_FD flag to get task exit notification via fd

From: Josh Triplett
Date: Sat Mar 14 2015 - 15:01:49 EST

On Sat, Mar 14, 2015 at 11:38:29AM -0700, Thiago Macieira wrote:
> On Saturday 14 March 2015 15:32:35 Oleg Nesterov wrote:
> > It is not clear to me what do_wait() should do with ->autoreap child, even
> > ignoring ptrace.
> >
> > Just suppose that real_parent has a single "autoreap" child. Should
> > wait(NULL) hanf then?
> It should ignore the child that is set to autoreap. wait(NULL) should return -
> ECHILD, indicating there are no children waiting to be reaped.

Right. And I don't think the current code does this. I think we need
to change wait_consider_task to early-return for ->autoreap just as it
does for task_state == EXIT_DEAD. I'll do that in v2.

- Josh Triplett
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