Re: [regression, 2.6.37-rc1] 'ip link tap0 up' stuck in do_exit()

Eric Dumazet
2010-12-09T17:09:29Z

Le jeudi 09 décembre 2010 à 18:07 +0100, Eric Dumazet a écrit :
> Le vendredi 10 décembre 2010 à 00:47 +0800, Américo Wang a écrit :
>
> > Yeah, there is no point that a zombie can trigger a BUG_ON in kenrel.
> > But it is still interesting to know why it becomes a zombie...
> >
>
> A zombie is very easy to get.
>
> Technically speaking, all processes die and become zombies, unless
> parent said : signal(SIGCLD, SIG_IGN) before fork()
>
> The parent is buggy (sudo in this case ?) and doesnt call wait() to
> 'free' one of its children.
>
>

Before you ask :)

If the parent dies before the child, task is re-parented to init.

Then, with namespaces, I dont know what happens (is there one init per
namespace ?)