From patchwork Thu Jul 2 06:38:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li RongQing X-Patchwork-Id: 1320998 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=none (p=none dis=none) header.from=baidu.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49y7hZ2nGKz9sPF for ; Thu, 2 Jul 2020 16:38:22 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726844AbgGBGiV (ORCPT ); Thu, 2 Jul 2020 02:38:21 -0400 Received: from mx137-tc.baidu.com ([61.135.168.137]:54392 "EHLO tc-sys-mailedm01.tc.baidu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725774AbgGBGiT (ORCPT ); Thu, 2 Jul 2020 02:38:19 -0400 Received: from localhost (cp01-cos-dev01.cp01.baidu.com [10.92.119.46]) by tc-sys-mailedm01.tc.baidu.com (Postfix) with ESMTP id 6DD57204004B; Thu, 2 Jul 2020 14:38:05 +0800 (CST) From: Li RongQing To: intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org Subject: [PATCH][net-next] i40e: prefetch struct page of rx buffer conditionally Date: Thu, 2 Jul 2020 14:38:05 +0800 Message-Id: <1593671885-30822-1-git-send-email-lirongqing@baidu.com> X-Mailer: git-send-email 1.7.1 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org page_address() accesses struct page only when WANT_PAGE_VIRTUAL or HASHED_PAGE_VIRTUAL is defined, otherwise it returns address based on offset, so we prefetch it conditionally Signed-off-by: Li RongQing Tested-by: Andrew Bowers --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index f9555c847f73..b3836092c327 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -1953,7 +1953,9 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer(struct i40e_ring *rx_ring, struct i40e_rx_buffer *rx_buffer; rx_buffer = i40e_rx_bi(rx_ring, rx_ring->next_to_clean); +#if defined(WANT_PAGE_VIRTUAL) || defined(HASHED_PAGE_VIRTUAL) prefetchw(rx_buffer->page); +#endif /* we are reusing so sync this buffer for CPU use */ dma_sync_single_range_for_cpu(rx_ring->dev,