Re: [PATCH] notify_parent and ptrace cleanup

[Roland McGrath]

> SIGKILL _already_ doesn't actually wake up a ptraced task. It just informs 
> the tracer, last I looked.

I think it's supposed to do so now, and actually fails to only sometimes in
practice and I don't know what the conditions are.  But, if you find it
acceptable that a traced task stay stopped in trace and not die from
SIGKILL until the tracer resumes it or detaches/dies, then aiming for that
certainly makes it easier to keep the ptrace code race-free.

> So a new state should be pretty simple, and I really think it would be the
> right way to go. That said, I might just be completely wrong - maybe there
> are practical problems to that approach that I don't see right now.

I'm going to try it out very soon and then we can see how the testing goes.


Thanks,
Roland
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/