Subject: Re: [PATCH net] vmxnet3: use gro callback when UPT is enabled

From: Jakub Kicinski <[email-masked]>
Date: Wed, 15 Mar 2023 21:13:29 -0700

On Thu, 16 Mar 2023 04:03:52 +0000 Ronak Doshi wrote:
> > Calling netif_receive_skb() with NETIF_F_GRO bit set in netdev->features will cause
> > confusion for user, IMHO.  
> As long as LRO is enabled and performed by ESXi (which it will do), I don’t think user cares for GRO.
> Even if we use napi_gro_receive() for such case, it degrades the performance as unnecessary cycles
> are spend on an already LRO'ed packet.

Can you provide some numbers to illustrate what the slow down is?