RE: [Intel-wired-lan] [PATCH net-next 3/9] i40e: switch to napi_build_skb()

[G, GurucharanX]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@xxxxxxxxxx> On Behalf Of
> Alexander Lobakin
> Sent: Tuesday, November 23, 2021 10:49 PM
> To: intel-wired-lan@xxxxxxxxxxxxxxxx
> Cc: netdev@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Jakub Kicinski
> <kuba@xxxxxxxxxx>; David S. Miller <davem@xxxxxxxxxxxxx>
> Subject: [Intel-wired-lan] [PATCH net-next 3/9] i40e: switch to napi_build_skb()
> 
> napi_build_skb() reuses per-cpu NAPI skbuff_head cache in order to save some
> cycles on freeing/allocating skbuff_heads on every new Rx or completed Tx.
> i40e driver runs Tx completion polling cycle right before the Rx one and uses
> napi_consume_skb() to feed the cache with skbuff_heads of completed entries,
> so it's never empty and always warm at that moment. Switch to the
> napi_build_skb() to relax mm pressure on heavy Rx.
> 
> Signed-off-by: Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>
> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@xxxxxxxxxxxxxxx>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_txrx.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Tested-by: Gurucharan G <gurucharanx.g@xxxxxxxxx> (A Contingent worker at Intel)