[Intel-wired-lan] [PATCH net-next 6/9] igb: switch to napi_build_skb()
Alexander Lobakin
alexandr.lobakin at intel.com
Tue Nov 23 17:18:37 UTC 2021
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.
igb 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 at intel.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski at linux.intel.com>
---
drivers/net/ethernet/intel/igb/igb_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 18a019a47182..c49a8d7409ed 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -8367,7 +8367,7 @@ static struct sk_buff *igb_build_skb(struct igb_ring *rx_ring,
net_prefetch(xdp->data_meta);
/* 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))
return NULL;
--
2.33.1
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