From patchwork Wed Aug 26 12:54:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tariq Toukan X-Patchwork-Id: 1351920 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mellanox.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Bc5RD6WQnz9sSJ for ; Wed, 26 Aug 2020 22:54:32 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730050AbgHZMyb (ORCPT ); Wed, 26 Aug 2020 08:54:31 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:44439 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729941AbgHZMy3 (ORCPT ); Wed, 26 Aug 2020 08:54:29 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from tariqt@mellanox.com) with SMTP; 26 Aug 2020 15:54:21 +0300 Received: from dev-l-vrt-206-005.mtl.labs.mlnx (dev-l-vrt-206-005.mtl.labs.mlnx [10.234.206.5]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 07QCsLG5003731; Wed, 26 Aug 2020 15:54:21 +0300 From: Tariq Toukan To: "David S. Miller" Cc: netdev@vger.kernel.org, Moshe Shemesh , Saeed Mahameed , Jakub Kicinski , Tariq Toukan Subject: [PATCH net-next 3/3] net/mlx4_en: RX, Add a prefetch command for small L1_CACHE_BYTES Date: Wed, 26 Aug 2020 15:54:18 +0300 Message-Id: <20200826125418.11379-4-tariqt@mellanox.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200826125418.11379-1-tariqt@mellanox.com> References: <20200826125418.11379-1-tariqt@mellanox.com> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org A single cacheline might not contain the packet header for small L1_CACHE_BYTES values. Use net_prefetch() as it issues an additional prefetch in this case. Signed-off-by: Tariq Toukan Reviewed-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx4/en_rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index b50c567ef508..99d7737e8ad6 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -705,7 +705,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud frags = ring->rx_info + (index << priv->log_rx_info); va = page_address(frags[0].page) + frags[0].page_offset; - prefetchw(va); + net_prefetchw(va); /* * make sure we read the CQE after we read the ownership bit */