From: Arnd Bergmann <arnd@arndb•de>
To: Vivek Kashyap <kashyapv@us•ibm.com>
Cc: Scott Feldman <scofeldm@cisco•com>,
davem@davemloft•net, netdev@vger•kernel.org, chrisw@redhat•com,
Jens Osterkamp <Jens.Osterkamp@gmx•de>
Subject: Re: [net-next-2.6 PATCH 2/2] add ndo_set_port_profile op support for enic dynamic vnics
Date: Mon, 3 May 2010 13:32:34 +0200 [thread overview]
Message-ID: <201005031332.34955.arnd@arndb.de> (raw)
In-Reply-To: <alpine.LFD.2.00.1005022119140.16925@vk>
On Monday 03 May 2010, Vivek Kashyap wrote:
> > After a successful pre-associate-with-resource-reservation step, we
> > know that the actual associate step will be both fast and successful.
> > After it completes, the VSI is known to be on the destination
> > and all traffic goes there (replacing the gratuitous ARP method we do
> > today).
> >
> > I don't think we'd ever do a pre-associate without the
> > resource-reservation, but the standard defines both. In theory,
> > we could do a pre-associate at every switch in the data center
> > in order to find out if it's possible to migrate there.
> >
> > If you want to have more details, please look at the draft spec at
> > http://www.ieee802.org/1/files/public/docs2010/bg-joint-evb-0410v1.pdf
>
> The basic difference is that in 'pre-associate with resoruce reservation', the
> local buffers and resources needed for the eventual 'associate' are reserved
> at the switch port. Therefore the associate will not fail with
> 'insufficient resources'. It might otherwise.
Yes, that's exactly what I wrote. So do you have any idea why we would
ever not want to do the resource reservation?
Arnd
next prev parent reply other threads:[~2010-05-03 11:32 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-28 4:42 [net-next-2.6 PATCH 1/2] Add netdev port-profile support (take III, was iovnl) Scott Feldman
2010-04-28 4:42 ` [net-next-2.6 PATCH 2/2] add ndo_set_port_profile op support for enic dynamic vnics Scott Feldman
2010-04-28 13:32 ` Arnd Bergmann
2010-04-28 18:39 ` Scott Feldman
2010-04-28 19:16 ` Arnd Bergmann
2010-04-28 22:38 ` Scott Feldman
2010-04-29 12:27 ` Arnd Bergmann
2010-04-29 14:32 ` Scott Feldman
2010-04-29 15:48 ` Arnd Bergmann
2010-04-29 16:31 ` Scott Feldman
2010-04-30 20:34 ` Scott Feldman
2010-05-01 12:36 ` Arnd Bergmann
2010-05-03 4:29 ` Vivek Kashyap
2010-05-03 11:32 ` Arnd Bergmann [this message]
2010-05-03 16:18 ` Vivek Kashyap
2010-04-28 13:13 ` [net-next-2.6 PATCH 1/2] Add netdev port-profile support (take III, was iovnl) Arnd Bergmann
2010-04-28 17:51 ` Scott Feldman
2010-04-28 19:33 ` Arnd Bergmann
2010-04-28 18:54 ` Scott Feldman
2010-04-28 19:37 ` Arnd Bergmann
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