From: "Michael S. Tsirkin" <mst@redhat.com>
To: Herbert Xu <herbert@gondor.hengli.com.au>
Cc: "Xin, Xiaohui" <xiaohui.xin@intel.com>,
Stephen Hemminger <shemminger@vyatta.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"mingo@elte.hu" <mingo@elte.hu>,
"davem@davemloft.net" <davem@davemloft.net>,
"jdike@linux.intel.com" <jdike@linux.intel.com>,
Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [RFC PATCH v7 01/19] Add a new structure for skb buffer from external.
Date: Sun, 20 Jun 2010 13:39:09 +0300 [thread overview]
Message-ID: <20100620103909.GA5285@redhat.com> (raw)
In-Reply-To: <20100620103235.GA31284@gondor.apana.org.au>
On Sun, Jun 20, 2010 at 08:32:35PM +1000, Herbert Xu wrote:
> On Sun, Jun 20, 2010 at 01:06:32PM +0300, Michael S. Tsirkin wrote:
> >
> > Changing the guest virtio to match the backend is a problem,
> > this breaks migration etc.
>
> As long as it's done in a backwards compatible way it should be
> fine.
Possibly, but to me the need to do this implies that
we'll need another change with different hardware at the backend.
> It's just like migrating from a backend that supports TSO
> to one that doesn't.
>
> Cheers,
Exactly. We don't support such migration.
> --
> Visit Openswan at http://www.openswan.org/
> Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2010-06-20 10:44 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-05 10:14 [RFC PATCH v7 01/19] Add a new structure for skb buffer from external xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 02/19] Add a new struct for device to manipulate external buffer xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 03/19] Export 2 func for device to assign/deassign new strucure xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 04/19] Add a ndo_mp_port_prep pointer to net_device_ops xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 05/19] Add a function make external buffer owner to query capability xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 06/19] Add a function to indicate if device use external buffer xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 07/19] Add interface to get external buffers xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 08/19] Make __alloc_skb() to get external buffer xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 09/19] Ignore room skb_reserve() when device is using " xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 10/19] Don't do skb recycle, if device use " xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 11/19] Use callback to deal with skb_release_data() specially xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 12/19] Add a hook to intercept external buffers from NIC driver xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 13/19] To skip GRO if buffer is external currently xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 14/19] Add header file for mp device xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 15/19] Add basic funcs and ioctl to " xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 16/19] Manipulate external buffers in " xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 17/19] Export proto_ops to vhost-net driver xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 18/19] Add a kconfig entry and make entry for mp device xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 19/19] Provides multiple submits and asynchronous notifications xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 10:14 ` [RFC PATCH v7 00/19] Provide a zero-copy method on KVM virtio-net xiaohui.xin
2010-06-05 10:14 ` xiaohui.xin
2010-06-05 14:56 ` [RFC PATCH v7 11/19] Use callback to deal with skb_release_data() specially Eric Dumazet
2010-06-05 14:56 ` Eric Dumazet
2010-06-09 7:30 ` Xin, Xiaohui
2010-06-09 7:30 ` Xin, Xiaohui
2010-06-05 14:53 ` [RFC PATCH v7 08/19] Make __alloc_skb() to get external buffer Eric Dumazet
2010-06-05 14:53 ` Eric Dumazet
2010-06-09 7:34 ` Xin, Xiaohui
2010-06-09 7:34 ` Xin, Xiaohui
2010-06-05 14:51 ` [RFC PATCH v7 03/19] Export 2 func for device to assign/deassign new strucure Eric Dumazet
2010-06-05 14:51 ` Eric Dumazet
2010-06-06 23:13 ` [RFC PATCH v7 01/19] Add a new structure for skb buffer from external Stephen Hemminger
2010-06-06 23:13 ` Stephen Hemminger
2010-06-07 7:51 ` Andi Kleen
2010-06-07 7:51 ` Andi Kleen
2010-06-07 8:17 ` Mitchell Erblich
2010-06-07 8:17 ` Mitchell Erblich
2010-06-09 9:22 ` Xin, Xiaohui
2010-06-09 9:22 ` Xin, Xiaohui
2010-06-09 8:48 ` Xin, Xiaohui
2010-06-09 8:48 ` Xin, Xiaohui
2010-06-08 5:27 ` Herbert Xu
2010-06-08 5:27 ` Herbert Xu
2010-06-09 9:54 ` Xin, Xiaohui
2010-06-09 9:54 ` Xin, Xiaohui
2010-06-11 5:21 ` Herbert Xu
2010-06-11 5:21 ` Herbert Xu
2010-06-12 9:31 ` Xin, Xiaohui
2010-06-12 9:31 ` Xin, Xiaohui
2010-06-13 8:58 ` Xin, Xiaohui
2010-06-13 8:58 ` Xin, Xiaohui
2010-06-17 11:21 ` Herbert Xu
2010-06-17 11:21 ` Herbert Xu
2010-06-18 5:26 ` Xin, Xiaohui
2010-06-18 5:26 ` Xin, Xiaohui
2010-06-18 5:59 ` Herbert Xu
2010-06-18 5:59 ` Herbert Xu
2010-06-18 7:14 ` Xin, Xiaohui
2010-06-18 7:14 ` Xin, Xiaohui
2010-06-18 7:45 ` Herbert Xu
2010-06-18 7:45 ` Herbert Xu
2010-06-20 10:06 ` Michael S. Tsirkin
2010-06-20 10:32 ` Herbert Xu
2010-06-20 10:32 ` Herbert Xu
2010-06-20 10:39 ` Michael S. Tsirkin [this message]
2010-06-20 11:02 ` Herbert Xu
2010-06-20 11:02 ` Herbert Xu
2010-06-20 11:11 ` Michael S. Tsirkin
2010-06-20 11:36 ` Herbert Xu
2010-06-20 11:36 ` Herbert Xu
2010-06-20 11:47 ` Michael S. Tsirkin
2010-06-20 11:59 ` Herbert Xu
2010-06-20 11:59 ` Herbert Xu
2010-06-20 12:48 ` Michael S. Tsirkin
2010-06-20 15:19 ` Ben Hutchings
2010-06-20 15:19 ` Ben Hutchings
2010-06-23 8:09 ` Dong, Eddie
2010-06-23 8:09 ` Dong, Eddie
2010-06-23 9:52 ` Herbert Xu
2010-06-23 9:52 ` Herbert Xu
2010-06-23 10:05 ` Dong, Eddie
2010-06-23 10:05 ` Dong, Eddie
2010-06-24 10:08 ` Herbert Xu
2010-06-24 10:08 ` Herbert Xu
2010-06-25 1:03 ` Dong, Eddie
2010-06-25 1:03 ` Dong, Eddie
2010-06-25 11:06 ` Michael S. Tsirkin
2010-06-27 6:14 ` Herbert Xu
2010-06-27 6:14 ` Herbert Xu
2010-06-28 9:56 ` Xin, Xiaohui
2010-06-28 9:56 ` Xin, Xiaohui
2010-06-28 10:00 ` Michael S. Tsirkin
2010-07-03 9:12 ` Herbert Xu
2010-07-03 9:12 ` Herbert Xu
2010-06-25 2:07 ` Xin, Xiaohui
2010-06-25 2:07 ` Xin, Xiaohui
2010-06-17 11:20 ` Herbert Xu
2010-06-17 11:20 ` Herbert Xu
2010-06-09 8:29 ` Xin, Xiaohui
2010-06-09 8:29 ` Xin, Xiaohui
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