[net-next 15/36] bnx2x: Prefetch the page containing the BD descriptor
From: Eilon Greenstein <hidden>
Date: 2009-08-12 18:24:15
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Signed-off-by: Vladislav Zolotarov <redacted> Signed-off-by: Eilon Greenstein <redacted> --- 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