From: "Denis V. Lunev" <den@sw.ru>
To: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: "Denis V. Lunev" <den@openvz.org>,
davem@davemloft.net, devel@openvz.org, netdev@vger.kernel.org,
containers@lists.osdl.org
Subject: Re: [PATCH 1/4] netns: Tag the network flow with the network namespace it is in (v2)
Date: Tue, 04 Dec 2007 21:42:49 +0300 [thread overview]
Message-ID: <47559FA9.2080109@sw.ru> (raw)
In-Reply-To: <20071204062605.508cf812@shemminger-laptop>
Stephen Hemminger wrote:
> Can this be made conditional on network namespaces being configured on?
> That way the flow structure won't have to grow taking more space.
> It matters in DoS attacks where flow cache becomes a critical resource.
could you exactly point me out the flow cache your are talking about.
Is this dst entry cache or struct flow_cache described in the
net/core/flow.c
For the latter case, there is completely no difference in the size on my
x86_64 host with SLAB allocator, i.e. there are 30 objects per slab
with/without fl_net (objsize = 128).
Regards,
Den
next prev parent reply other threads:[~2007-12-04 18:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-04 9:53 [PATCH 1/4] netns: Tag the network flow with the network namespace it is in (v2) Denis V. Lunev
2007-12-04 14:26 ` Stephen Hemminger
2007-12-04 18:42 ` Denis V. Lunev [this message]
2007-12-04 22:40 ` Herbert Xu
2007-12-04 22:40 ` Herbert Xu
2007-12-05 6:49 ` Denis V. Lunev
2007-12-05 10:10 ` David Miller
2007-12-05 10:13 ` David Miller
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