Messages in this thread Patch in this message | | | Date | Wed, 26 Jan 2022 13:16:41 +0000 | From | Hyeonggon Yoo <> | Subject | [PATCH v2] net: ena: Do not waste napi skb cache |
| |
By profiling, discovered that ena device driver allocates skb by build_skb() and frees by napi_skb_cache_put(). Because the driver does not use napi skb cache in allocation path, napi skb cache is periodically filled and flushed. This is waste of napi skb cache.
As ena_alloc_skb() is called only in napi, Use napi_build_skb() and napi_alloc_skb() when allocating skb.
This patch was tested on aws a1.metal instance.
[ jwiedmann.dev@gmail.com: Use napi_alloc_skb() instead of netdev_alloc_skb_ip_align() to keep things consistent. ]
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index 53080fd143dc..07444aead3fd 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -1400,10 +1400,9 @@ static struct sk_buff *ena_alloc_skb(struct ena_ring *rx_ring, void *first_frag) struct sk_buff *skb; if (!first_frag) - skb = netdev_alloc_skb_ip_align(rx_ring->netdev, - rx_ring->rx_copybreak); + skb = napi_alloc_skb(rx_ring->napi, rx_ring->rx_copybreak); else - skb = build_skb(first_frag, ENA_PAGE_SIZE); + skb = napi_build_skb(first_frag, ENA_PAGE_SIZE); if (unlikely(!skb)) { ena_increase_stat(&rx_ring->rx_stats.skb_alloc_fail, 1, -- 2.33.1
| |