netdev - Re: debug: nt_conntrack and KVM crash

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Date:	Mon, 01 Feb 2010 05:35:52 -0500
From:	Jon Masters <jonathan@...masters.org>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>,
	netfilter-devel <netfilter-devel@...r.kernel.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: debug: nt_conntrack and KVM crash

On Mon, 2010-02-01 at 11:36 +0200, Alexey Dobriyan wrote:
> On Mon, Feb 1, 2010 at 11:32 AM, Jon Masters <jonathan@...masters.org> wrote:
> > I hacked up a per-namespace version of hashtables (this needs doing
> > anyway, since the global stuff is just waiting to break)
> 
> Which ones? Conntrack hashtables are per-netns.

They are, but the metadata is not. Sorry for not being clear, but my
previous mail was. i.e. there is a per-netns hashtable that is indexed
using a global that might change at any time underneath. The htable size
and max should be per-netns too.

An existing sysctl/module parameter affects these and should also
ultimately either iterate through namespaces, or only affect the global
init_net (as it almost does now, except it changes the data used by the
others and doesn't resize them).

Jon.

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