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    SubjectRe: [Xen-devel] [RFC PATCH 34/35] Add the Xen virtual network device driver.
    On Tue, May 09, 2006 at 09:55:33PM +1000, Herbert Xu wrote:
    > Hi Chris:
    > Chris Wright <> wrote:
    > >
    > > +/** Send a packet on a net device to encourage switches to learn the
    > > + * MAC. We send a fake ARP request.
    > > + *
    > > + * @param dev device
    > > + * @return 0 on success, error code otherwise
    > > + */
    > > +static int send_fake_arp(struct net_device *dev)
    > I think we talked about this before. I don't see why Xen is so special
    > that it needs its own gratuitous arp routine embedded in the driver.
    > If this is needed at all (presumably for migration) then it should be
    > performed by the management scripts which can send grat ARP packets just
    > as easily.

    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
    - anybody but the guest might not know (all) the MAC addresses for which
    to send a fake ARP request


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      Last update: 2006-05-09 14:46    [W:0.019 / U:78.088 seconds]
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