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

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Message-ID: <20120119133134.GK2262734@jupiter.n2.diac24.net>
Date:	Thu, 19 Jan 2012 14:31:34 +0100
From:	David Lamparter <equinox@...c24.net>
To:	Hans Schillstrom <hans.schillstrom@...csson.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: RFC Hanging clean-up of a namespace

On Thu, Jan 19, 2012 at 12:07:09PM +0100, Hans Schillstrom wrote:
> 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() 
> 
> A netns pre-close  callback might do the job....
> 
> Any ideas how to solve this ?

I'm interested in this too; right off I don't see a workable alternative
to your suggestion. Each subsystem will have to implement that callback
and release its references on the netns.


-David

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