From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4FBDC47247 for ; Thu, 30 Apr 2020 13:55:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8B83520661 for ; Thu, 30 Apr 2020 13:55:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588254946; bh=0+cc2i/KRxthcaGTG/Xr9mN+nP18onUrbB2ErqEFFOg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=07lzj4JQXC71lNdxtD3VZy6HdkFicpxYTHaWrYDO486cds4p6NwOdyx6QbHfVTzJO KRhRcXo0hyF2Xkdh69rGOsfEgwea12JcSyI+8onUSd3OXk2N31HHoZI+JbyY5QvB4i r3mcYIht9k2OyEBRL++iR1OhZfvZD65/Q2W5CWUI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729192AbgD3Nzp (ORCPT ); Thu, 30 Apr 2020 09:55:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:37986 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729118AbgD3NzF (ORCPT ); Thu, 30 Apr 2020 09:55:05 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 666DF24964; Thu, 30 Apr 2020 13:55:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588254905; bh=0+cc2i/KRxthcaGTG/Xr9mN+nP18onUrbB2ErqEFFOg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UplPgu3kHvgKRI3pp9WLtINMBhNrFKPmkDdPk+lSxKjARswe9lYZv7bY9krBtwwaY LrboplG+rKAHIK+Z0uifHsjRl700ejvVHJwb3v8jIZ6NUf7WU/o4/VYDpDIdk3hswP lsV3S2WFCU5kABuCFxCzvqyQZpbJT+GmR5fRj6vU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Doug Berger , Florian Fainelli , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 10/11] net: bcmgenet: suppress warnings on failed Rx SKB allocations Date: Thu, 30 Apr 2020 09:54:52 -0400 Message-Id: <20200430135453.21353-10-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200430135453.21353-1-sashal@kernel.org> References: <20200430135453.21353-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Doug Berger [ Upstream commit ecaeceb8a8a145d93c7e136f170238229165348f ] The driver is designed to drop Rx packets and reclaim the buffers when an allocation fails, and the network interface needs to safely handle this packet loss. Therefore, an allocation failure of Rx SKBs is relatively benign. However, the output of the warning message occurs with a high scheduling priority that can cause excessive jitter/latency for other high priority processing. This commit suppresses the warning messages to prevent scheduling problems while retaining the failure count in the statistics of the network interface. Signed-off-by: Doug Berger Acked-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/genet/bcmgenet.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index 34fae5576b603..4b3b396bd8ebe 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -1575,7 +1575,8 @@ static struct sk_buff *bcmgenet_rx_refill(struct bcmgenet_priv *priv, dma_addr_t mapping; /* Allocate a new Rx skb */ - skb = netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT); + skb = __netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT, + GFP_ATOMIC | __GFP_NOWARN); if (!skb) { priv->mib.alloc_rx_buff_failed++; netif_err(priv, rx_err, priv->dev, -- 2.20.1