diff options
| author | Hyeonggon Yoo <42.hyeyoo@gmail.com> | 2022-01-29 08:53:36 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-01-31 21:36:21 -0800 |
| commit | 7354a426e063e108c0a3590f13abc77573172576 (patch) | |
| tree | 086b24e3ee1767e67b6e070e386dfae8d4ffa243 /drivers/net/ethernet/amazon/ena | |
| parent | ef10bd49df234aadd4e0ab693e151c10e5338c65 (diff) | |
| download | linux-7354a426e063e108c0a3590f13abc77573172576.tar.gz linux-7354a426e063e108c0a3590f13abc77573172576.tar.bz2 linux-7354a426e063e108c0a3590f13abc77573172576.zip | |
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>
Acked-by: Shay Agroskin <shayagr@amazon.com>
Link: https://lore.kernel.org/r/YfUAkA9BhyOJRT4B@ip-172-31-19-208.ap-northeast-1.compute.internal
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/amazon/ena')
| -rw-r--r-- | drivers/net/ethernet/amazon/ena/ena_netdev.c | 5 |
1 files 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, |