Re-sending as my earlier response had some HTML subparts.
Let me give some background before I answer your queries.
In IBM PowerVM environment, ibmveth driver supports largesend and
checksum offload today, but only for virtual ethernet adapters (VEA)
which are not configured in "Trunk mode".
From: Sivakumar Krishnasamy
Date: Fri, 7 Apr 2017 05:57:59 -0400
> Enable largesend and checksum offload for ibmveth configured in trunk mode.
> Added support to SKB frag_list in TX path by skb_linearize'ing such SKBs.
>
> Signed-off-by: Sivakumar Krishnasamy
Enable largesend and checksum offload for ibmveth configured in trunk mode.
Added support to SKB frag_list in TX path by skb_linearize'ing such SKBs.
Signed-off-by: Sivakumar Krishnasamy
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drivers/net/ethernet/ibm/ibmveth.c | 102 ++---