[PATCH net-next V4 4/9] eth: fbnic: Prefetch packet headers on Rx
From: Mohsin Bashir <hidden>
Date: 2025-08-13 22:13:40
Also in:
bpf, linux-doc, lkml
Subsystem:
meta ethernet drivers, networking drivers, the rest · Maintainers:
Alexander Duyck, Jakub Kicinski, Andrew Lunn, "David S. Miller", Eric Dumazet, Paolo Abeni, Linus Torvalds
Issue a prefetch for the start of the buffer on Rx to try to avoid cache miss on packet headers. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Mohsin Bashir <redacted> --- drivers/net/ethernet/meta/fbnic/fbnic_txrx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c
index 2adbe175ac09..65d1e40addec 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c@@ -888,7 +888,7 @@ static void fbnic_pkt_prepare(struct fbnic_napi_vector *nv, u64 rcd, /* Build frame around buffer */ hdr_start = page_address(page) + hdr_pg_start; - + net_prefetch(pkt->buff.data); xdp_prepare_buff(&pkt->buff, hdr_start, headroom, len - FBNIC_RX_PAD, true);
--
2.47.3