[ovs-discuss] Zero-Copy in the upcall

Justin Pettit jpettit at ovn.org
Thu Aug 1 03:57:41 UTC 2019

> On Jul 31, 2019, at 1:14 PM, Adel Belkhiri <adel.belkhiri at gmail.com> wrote:
> Hey all,
> In the recent versions of Openvswitch, whenever a packet is received and doesn't match any flow within the datapath, it is zero-copied  to the userspace. 
> Does that mean the whole packet is zero-copied or only the data part of its skb structure ?

Working from memory, I'm fairly certain it's the entire packet, since there's no queuing mechanism in the kernel datapath.


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