bnx2x: Prefetch the page containing the BD descriptor

Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 88f30d2..bdc2e71 100644 (file)
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -1498,6 +1498,13 @@ static int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
                bd_prod = RX_BD(bd_prod);
                bd_cons = RX_BD(bd_cons);
 
+               /* Prefetch the page containing the BD descriptor
+                  at producer's index. It will be needed when new skb is
+                  allocated */
+               prefetch((void *)(PAGE_ALIGN((unsigned long)
+                                            (&fp->rx_desc_ring[bd_prod])) -
+                                 PAGE_SIZE + 1));
+
                cqe = &fp->rx_comp_ring[comp_ring_cons];
                cqe_fp_flags = cqe->fast_path_cqe.type_error_flags;