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| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2021-01-29 23:04:08 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-02-04 01:00:07 +0100 |
| commit | 65e6dcf73398ddb64bb782ff2acd918d3a37a53a (patch) | |
| tree | 7c86b42732ff1c1c53d479a387ff4819caab68dc /net/core/xdp.c | |
| parent | selftest/bpf: Testing for multiple logs on REJECT (diff) | |
| download | linux-65e6dcf73398ddb64bb782ff2acd918d3a37a53a.tar.xz linux-65e6dcf73398ddb64bb782ff2acd918d3a37a53a.zip | |
net, veth: Alloc skb in bulk for ndo_xdp_xmit
Split ndo_xdp_xmit and ndo_start_xmit use cases in veth_xdp_rcv routine
in order to alloc skbs in bulk for XDP_PASS verdict.
Introduce xdp_alloc_skb_bulk utility routine to alloc skb bulk list.
The proposed approach has been tested in the following scenario:
eth (ixgbe) --> XDP_REDIRECT --> veth0 --> (remote-ns) veth1 --> XDP_PASS
XDP_REDIRECT: xdp_redirect_map bpf sample
XDP_PASS: xdp_rxq_info bpf sample
traffic generator: pkt_gen sending udp traffic on a remote device
bpf-next master: ~3.64Mpps
bpf-next + skb bulking allocation: ~3.79Mpps
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Toshiaki Makita <toshiaki.makita1@gmail.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/a14a30d3c06fff24e13f836c733d80efc0bd6eb5.1611957532.git.lorenzo@kernel.org
Diffstat (limited to 'net/core/xdp.c')
| -rw-r--r-- | net/core/xdp.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/core/xdp.c b/net/core/xdp.c index 0d2630a35c3e..05354976c1fc 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -514,6 +514,17 @@ void xdp_warn(const char *msg, const char *func, const int line) }; EXPORT_SYMBOL_GPL(xdp_warn); +int xdp_alloc_skb_bulk(void **skbs, int n_skb, gfp_t gfp) +{ + n_skb = kmem_cache_alloc_bulk(skbuff_head_cache, gfp, + n_skb, skbs); + if (unlikely(!n_skb)) + return -ENOMEM; + + return 0; +} +EXPORT_SYMBOL_GPL(xdp_alloc_skb_bulk); + struct sk_buff *__xdp_build_skb_from_frame(struct xdp_frame *xdpf, struct sk_buff *skb, struct net_device *dev) |