linux-kernel - Re: [RFC PATCH 32/33] Add the Xen virtual network device driver.

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Message-Id: <278d0ba5a24d74c5b590dd76d234c312@cl.cam.ac.uk>
Date:	Tue, 18 Jul 2006 11:35:38 +0100
From:	Keir Fraser <Keir.Fraser@...cam.ac.uk>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Ian Pratt <ian.pratt@...source.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	virtualization@...ts.osdl.org, Andrew Morton <akpm@...l.org>,
	netdev@...r.kernel.org, Chris Wright <chrisw@...s-sol.org>
Subject: Re: [RFC PATCH 32/33] Add the Xen virtual network device driver.


On 18 Jul 2006, at 11:27, Arjan van de Ven wrote:

> Hmmm maybe it's me, but something bugs me if a NIC driver is going to
> send IP level ARP packets... that just feels very very wrong and is a
> blatant layering violation.... shouldn't the ifup/ifconfig scripts just
> be fixed instead if this is critical behavior?

Maybe we should be faking this out from our hotplug scripts in the 
control VM, although triggering this from user space is probably a bit 
of a pain. Regardless, the function can be removed from the driver if 
it's too distasteful: it's only a performance 'hack' to get network 
traffic more quickly redirected when migrating a VM between physical 
hosts. Things won't break horribly if it's removed.

  -- Keir

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