From patchwork Tue Jul 28 19:08:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 1337969 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=intel.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BGR6Y1XxHz9sRN for ; Wed, 29 Jul 2020 05:08:53 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732583AbgG1TIw (ORCPT ); Tue, 28 Jul 2020 15:08:52 -0400 Received: from mga05.intel.com ([192.55.52.43]:43602 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729168AbgG1TIv (ORCPT ); Tue, 28 Jul 2020 15:08:51 -0400 IronPort-SDR: KC2Y9DIg3vLdKdN8yuDyeWk5DnL+/O+cLiKbplJ5wIQUBxzcJIi0fKzBe0w4OlErIWfhx7lw5N H0/cyd1zVYTQ== X-IronPort-AV: E=McAfee;i="6000,8403,9696"; a="236163821" X-IronPort-AV: E=Sophos;i="5.75,407,1589266800"; d="scan'208";a="236163821" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jul 2020 12:08:50 -0700 IronPort-SDR: UvqVpwsY3J/gAJK6TO91qbXwBRfWT7hQE9jj8PfeHHK3y1Lk+gfZXpjsyLQkTiUZ1tvMNIulVo iVL6Kn1oerYw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,407,1589266800"; d="scan'208";a="490006227" Received: from jtkirshe-desk1.jf.intel.com ([134.134.177.86]) by fmsmga006.fm.intel.com with ESMTP; 28 Jul 2020 12:08:49 -0700 From: Tony Nguyen To: davem@davemloft.net Cc: Li RongQing , netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com, jeffrey.t.kirsher@intel.com, anthony.l.nguyen@intel.com, Andrew Bowers Subject: [net-next 2/6] i40e: prefetch struct page of Rx buffer conditionally Date: Tue, 28 Jul 2020 12:08:38 -0700 Message-Id: <20200728190842.1284145-3-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200728190842.1284145-1-anthony.l.nguyen@intel.com> References: <20200728190842.1284145-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Li RongQing 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 Signed-off-by: Tony Nguyen --- 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 3e5c566ceb01..5d408fe26063 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,