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Re: [Xen-devel] [RFC PATCH 34/35] Add the Xen virtual network device dri

To: Christian.Limpach@xxxxxxxxxxxx (Christian Limpach)
Subject: Re: [Xen-devel] [RFC PATCH 34/35] Add the Xen virtual network device driver.
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 09 May 2006 23:01:05 +1000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, herbert@xxxxxxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, chrisw@xxxxxxxxxxxx, ian.pratt@xxxxxxxxxxxxx
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Christian Limpach <Christian.Limpach@xxxxxxxxxxxx> wrote:
> There's at least two reasons why having it in the driver is preferable:
> - synchronizing sending the fake ARP request with when the device is
>  operational -- you really want to make this well synchronized to keep
>  unreachability as short as possible, especially when doing live
>  migration
> - anybody but the guest might not know (all) the MAC addresses for which
>  to send a fake ARP request

Sure.  However, what's there to stop you from doing this in user-space
inside the guest?

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