[ovs-discuss] Does flows modifying arp field or using registers could only be used in slow path ?
kai xi fan
kaixi.f at gmail.com
Wed Nov 20 02:35:43 UTC 2019
Because there isn't much benefit. I do not know of any applications
where high-bandwidth flows modify ARP fields.
There is a type of attack which could send lots of arp request at a time.
If all of them are sent to the user-space, it will degrade the performance.
Ben Pfaff <blp at ovn.org> 于2019年11月20日周三 上午2:48写道：
> On Tue, Nov 19, 2019 at 02:55:29PM +0800, kai xi fan wrote:
> > why does ovs not generate fast path flows for flows modifying arp
> > field ?
> Because there isn't much benefit. I do not know of any applications
> where high-bandwidth flows modify ARP fields.
> > I have seen a mega flow in the ovs trace result. Final flow:
> > unchanged Megaflow:
> > Datapath actions: 1,3
> This sentence seems to be about a different topic, because the output
> you show does not involve modifying arp fields.
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