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 D4031C28CBC for ; Thu, 30 Apr 2020 13:55:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB3D220774 for ; Thu, 30 Apr 2020 13:55:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588254918; bh=0mSkGy0oC3RiEQxtQffXpbxMNK+NEg71P7bFUCmUyDw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Qy434wYtPms9CaE23Rj/jbc3feKKMoBh4N8khib6ciujph0QXM7ywJkvaK0qZ/XzH 771s9StbTfvXddQj4MtvlDCjCTg8kXSTODWmCiW8m/6Iay2fGZ5LMCwgLBEVvLXYTu hBmadAz8NjsqF4s+OvKUNr2ZUfv0wS0sx4tSUu+M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728403AbgD3NzR (ORCPT ); Thu, 30 Apr 2020 09:55:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:37028 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728988AbgD3Nyc (ORCPT ); Thu, 30 Apr 2020 09:54:32 -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 9B2A920870; Thu, 30 Apr 2020 13:54:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588254871; bh=0mSkGy0oC3RiEQxtQffXpbxMNK+NEg71P7bFUCmUyDw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UNDd8187a1/RI/XvENsvx2NZIlH6RY0Ssrxj72nNjBDVJtkME1XGfl9PGdoLaysOV +UNUlpNn0/w68uTOEZmexv1I5WJisJ9hVMpyQEVqtiKNWxBgEFL1JPNdleAO+40AIK MJEpJF8q59cdJ83k8VKD55fLUZVEvrfUBF7rPoQo= 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 4.14 26/27] net: bcmgenet: suppress warnings on failed Rx SKB allocations Date: Thu, 30 Apr 2020 09:54:01 -0400 Message-Id: <20200430135402.20994-26-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200430135402.20994-1-sashal@kernel.org> References: <20200430135402.20994-1-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 4b3660c63b864..38391230ca860 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -1674,7 +1674,8 @@ 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