From: Thomas Graf <tgraf@suug.ch>
To: Jesse Gross <jesse@nicira.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
"Du, Fan" <fan.du@intel.com>, Jason Wang <jasowang@redhat.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
"fw@strlen.de" <fw@strlen.de>,
"dev@openvswitch.org" <dev@openvswitch.org>,
Pravin Shelar <pshelar@nicira.com>
Subject: Re: [PATCH net] gso: do GSO for local skb with size bigger than MTU
Date: Wed, 3 Dec 2014 23:05:51 +0000 [thread overview]
Message-ID: <20141203230551.GC8822@casper.infradead.org> (raw)
In-Reply-To: <CAEP_g=90nC2HhmBNKh-hKJ5MJ85Z-_ER14roDxMsZAKog+dFhw@mail.gmail.com>
On 12/03/14 at 02:51pm, Jesse Gross wrote:
> My proposal would be something like this:
> * For L2, reduce the VM MTU to the lowest common denominator on the segment.
> * For L3, use path MTU discovery or fragment inner packet (i.e.
> normal routing behavior).
> * As a last resort (such as if using an old version of virtio in the
> guest), fragment the tunnel packet.
That's what I had in mind as well although using a differentiator bit
which indicates to the output path whether the packet is to be
considered switched or routed and thus send ICMPs. The bit would be set
per flow, thus allowing arbitary granularity of behaviour.
I haven't fully thought this through yet though.
next prev parent reply other threads:[~2014-12-03 23:05 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-28 6:33 [PATCH net] gso: do GSO for local skb with size bigger than MTU Fan Du
2014-11-28 7:02 ` Jason Wang
2014-11-30 10:08 ` Du, Fan
2014-12-01 13:52 ` Thomas Graf
[not found] ` <20141201135225.GA16814-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2014-12-01 15:06 ` Michael S. Tsirkin
2014-12-02 15:48 ` Flavio Leitner
2014-12-02 17:09 ` Thomas Graf
[not found] ` <20141202170927.GA9457-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2014-12-02 17:34 ` Michael S. Tsirkin
2014-12-02 17:41 ` Thomas Graf
2014-12-02 18:12 ` Jesse Gross
[not found] ` <CAEP_g=-86Z6pxNow-wjnbx_v9er_TSn6x5waigqVqYHa7tEQJw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-03 9:03 ` Michael S. Tsirkin
2014-12-03 18:07 ` Jesse Gross
[not found] ` <CAEP_g=9C+D3gbjJ4n1t6xuyjqEAMYi4ZfqPoe92UAoQJH-UsKg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-03 18:38 ` Michael S. Tsirkin
2014-12-03 18:56 ` Rick Jones
[not found] ` <547F5CC2.8000908-VXdhtT5mjnY@public.gmane.org>
2014-12-04 10:17 ` Michael S. Tsirkin
2014-12-03 19:38 ` Jesse Gross
2014-12-03 22:02 ` Thomas Graf
[not found] ` <20141203220244.GA8822-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2014-12-03 22:50 ` Michael S. Tsirkin
2014-12-03 22:51 ` Jesse Gross
2014-12-03 23:05 ` Thomas Graf [this message]
[not found] ` <20141203230551.GC8822-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2014-12-04 0:54 ` Jesse Gross
2014-12-04 1:15 ` Thomas Graf
2014-12-04 1:51 ` Jesse Gross
2014-12-04 9:26 ` Thomas Graf
2014-12-04 23:19 ` Jesse Gross
2014-12-04 7:48 ` Du Fan
2014-12-04 23:23 ` Jesse Gross
2014-12-05 0:25 ` Du Fan
2014-12-03 2:31 ` Du, Fan
2015-01-05 6:02 ` Fan Du
[not found] ` <54AA2912.6090903-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-05 17:58 ` Jesse Gross
2015-01-06 9:34 ` Fan Du
2015-01-06 19:11 ` Jesse Gross
[not found] ` <CAEP_g=8bCR=PeSoi09jLWLtNUrxhzx45h1Wm=9D=R57AqUac2w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-01-07 5:58 ` Fan Du
2015-01-07 20:52 ` Jesse Gross
[not found] ` <CAEP_g=8EBeQUFkRRsG3sznYryd+LE9qJKWQXfS==HG2HDO=UKA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-01-08 9:39 ` Fan Du
2015-01-08 19:55 ` Jesse Gross
[not found] ` <CAEP_g=9hh+MG7AWEnct7CwRqp=ZghpbkDeQ5BhGQktDgMST1jA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-01-09 5:42 ` Fan Du
2015-01-12 18:48 ` Jesse Gross
2015-01-09 5:48 ` Fan Du
2015-01-12 18:55 ` Jesse Gross
2015-01-13 16:58 ` Thomas Graf
2014-12-02 15:44 ` Flavio Leitner
2014-12-02 18:06 ` Jesse Gross
2014-12-02 21:32 ` Flavio Leitner
2014-12-02 21:47 ` Jesse Gross
2014-12-03 1:58 ` Du, Fan
2014-11-30 10:26 ` Florian Westphal
2014-11-30 10:55 ` Du, Fan
2014-11-30 15:11 ` Florian Westphal
2014-12-01 6:47 ` Du, Fan
2014-12-03 3:23 ` David Miller
2014-12-03 3:32 ` Du, Fan
2014-12-03 4:35 ` David Miller
2014-12-03 4:50 ` Du, Fan
2014-12-03 5:14 ` David Miller
2014-12-03 6:53 ` Du, Fan
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