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=ham 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 8FB31C4724C for ; Thu, 30 Apr 2020 13:54:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6197B20870 for ; Thu, 30 Apr 2020 13:54:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588254885; bh=S1JSz+EuGCEko2kFV6Ps5rtlpdoxnciQSx+eYv1jOe4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Vd+7azEAiE5PP8xXV7VceCMZDA5zo7mSOXLaHX7x1tq/kjeBDzLmubrMMY5izo0fe xFA8Sj2a1K8nd/nyeno5fyfeJNpRsbrZeDlcUr8RJnNXcphxRq95WFxVICFtzPupoI JCAXzlymg5gSrzfrFG/L2rCs0X0lN+xlV0ieeS6Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729038AbgD3Nyn (ORCPT ); Thu, 30 Apr 2020 09:54:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:36008 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728852AbgD3Nx5 (ORCPT ); Thu, 30 Apr 2020 09:53:57 -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 64F812063A; Thu, 30 Apr 2020 13:53:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588254837; bh=S1JSz+EuGCEko2kFV6Ps5rtlpdoxnciQSx+eYv1jOe4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BAtq/URLJVjvAjl60C5iYDR7Fa5L5ZvXBljRLch3F/c+z9HkpxhyEyDg9xzFbOt3u wA65Wg7cPQJhoqu7q6ZpqzjrOouceSfyJ+OGny20jrSTVSQ0R3VkMnXSrtngNU1zVP gbsT/nJfYMbDy+pBIapfW6ORry7P6OqkrwWevFbQ= 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 4.19 28/30] net: bcmgenet: suppress warnings on failed Rx SKB allocations Date: Thu, 30 Apr 2020 09:53:23 -0400 Message-Id: <20200430135325.20762-28-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200430135325.20762-1-sashal@kernel.org> References: <20200430135325.20762-1-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 789c206b515ed..89cc146d2c5c8 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -1699,7 +1699,8 @@ 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