Re: [Xen-devel] [PATCH v6 COLO 10/15] COLO proxy: implement setup/teardown of COLO proxy module

[Yang Hongyang <yanghy@xxxxxxxxxxxxxx>]

On 06/16/2015 07:26 PM, Ian Campbell wrote:
> On Tue, 2015-06-16 at 12:24 +0100, Ian Campbell wrote:
> > On Mon, 2015-06-08 at 11:45 +0800, Yang Hongyang wrote:
> > > setup/teardown of COLO proxy module.
> > > we use netlink to communicate with proxy module.
> > What is a COLO proxy module and where would one get hold of such a
> > thing?
> >
> > Is this a new kernel feature with a patch? If so then please link to its
> > posting to the appropriate upstream and indicate what you understand of
> > its progress upstream.
> >
> > (I seem to remember discussing a COLO networking component at the
> > hackathon which seemed like it could be done using existing components,
> > is that this?)
> IIRC the existing component I was thinking of was
> http://www.netfilter.org/projects/libnetfilter_queue/ which allows
> userspace to do pretty advanced filtering, queueing, gating, delaying
> etc of packets.
The reason we are not using userspace solution is that we worried about
the performance. There will be huge amount of packets pass through, the
context switch cost will be an overhead. The colo-proxy module:
https://lkml.org/lkml/2015/6/18/32

> Ian.
>
> .
--
Thanks,
Yang.

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