Commit 6e19cf7d authored by Alexander Lobakin's avatar Alexander Lobakin Committed by Tony Nguyen

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: default avatarAlexander Lobakin <alexandr.lobakin@intel.com>
Reviewed-by: default avatarMichal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: default avatarGurucharan G <gurucharanx.g@intel.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
parent 89a354c0
...@@ -2204,7 +2204,7 @@ static struct sk_buff *i40e_build_skb(struct i40e_ring *rx_ring, ...@@ -2204,7 +2204,7 @@ static struct sk_buff *i40e_build_skb(struct i40e_ring *rx_ring,
net_prefetch(xdp->data_meta); net_prefetch(xdp->data_meta);
/* build an skb around the page buffer */ /* build an skb around the page buffer */
skb = build_skb(xdp->data_hard_start, truesize); skb = napi_build_skb(xdp->data_hard_start, truesize);
if (unlikely(!skb)) if (unlikely(!skb))
return NULL; return NULL;
......
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