* [net-next 15/36] bnx2x: Prefetch the page containing the BD descriptor
@ 2009-08-12 18:23 Eilon Greenstein
0 siblings, 0 replies; only message in thread
From: Eilon Greenstein @ 2009-08-12 18:23 UTC (permalink / raw)
To: David Miller; +Cc: netdev, Vladislav Zolotarov
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
---
drivers/net/bnx2x_main.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index e6fde5e..594168a 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -1497,6 +1497,13 @@ 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;
--
1.5.4.3
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