netdev - RE: RFC Hanging clean-up of a namespace

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Date:	Thu, 19 Jan 2012 20:40:32 +0100
From:	Hans Schillström <hans.schillstrom@...csson.com>
To:	David Miller <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"ebiederm@...ssion.com" <ebiederm@...ssion.com>
Subject: RE: RFC Hanging clean-up of a namespace

>Date: Thu, 19 Jan 2012 12:07:09 +0100
>
>> Closing of a namespace (container) can be delayed by ~ 2 minutes
>> due to tcp timers ex tcp time wait (and of cource other things too).
>>
>> I think there should be some kind of "forced close" of the Network stack
>> in ex free_nsproxy()
>
>I think this is unwise.
>
>Keeping the timewait sockets around is necessary to absorb any lingering
>packets in the network meant for those sockets.
>
>If you truncate this activity, and then try to create another socket with
>the same ID you'll run into the very problems time-wait is meant to
>solve.
>
>It's an unfortunate delay, but one you will have to live with.

I think the whole clean up is to weak of the name space, there is too many things that
can go wrong and they do.

I was more thinking of a way to make a forced close, 
ex by cleaning the stack where time wait was one point.



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