Re: [PATCH 0/2] bring UP loopback device at initialziation

[Cong Wang <xiyou.wangcong@gmail.com>]

On Wed, Jul 5, 2017 at 8:59 AM, Mahesh Bandewar (महेश बंडेवार)
<maheshb@google.com> wrote:
> Systems have only one lo device (since ages) and that is usually taken
> care at the boot time. Now with the namespaces it's not just one
> device as it's per namespace and though not much this patch will
> benefit a little. Probably we should ask a question - is it going to
> have any bad effects? I couldn't find any and my RFC patch did not get
> me any such feedback. As far as the good effects are concerned, it has
> already found a bug (another patch in this series)! Also sometime back
> I did experience weird behavior inside net-namespace if you forget to
> bring-up the loopback device. I didn't pay too much attention as
> bringing up the lo device fixed it.
>

I wonder if it is too late to change this since this behavior is probably
from the beginning of network namespace. A networkless netns is also
useful at least for testing purpose, we do use it as a sandbox.