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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FB2DC433F5 for ; Mon, 24 Jan 2022 12:49:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242536AbiAXMtl (ORCPT ); Mon, 24 Jan 2022 07:49:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242659AbiAXMtk (ORCPT ); Mon, 24 Jan 2022 07:49:40 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 360B1C06173B for ; Mon, 24 Jan 2022 04:49:40 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id F219FB80F9B for ; Mon, 24 Jan 2022 12:49:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 123E2C340E1; Mon, 24 Jan 2022 12:49:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643028577; bh=tDsL3effNoVoUNXpKhR7QSTQWT7F+7e/lv6jtjX01Lo=; h=Subject:To:Cc:From:Date:From; b=eXrtypAWgtRe4jmtE/N91yR9qJx7fq/b867cMCvosuLFWP+Reui4yobmfjzBm1L8v tSbiaR/YuOsD/G3WPnKTzGZdWh/tAcZdUyypA/sQd2ytqSOWAC6ElTBZIH7SlziI+s KEx6hItU94P+cpBo50UpqashDscLh6cQxuSr5hvQ= Subject: FAILED: patch "[PATCH] net: axienet: increase default TX ring size to 128" failed to apply to 4.9-stable tree To: robert.hancock@calian.com, davem@davemloft.net Cc: From: Date: Mon, 24 Jan 2022 13:49:29 +0100 Message-ID: <1643028569197178@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 2d19c3fd80178160dd505ccd7fed1643831227a5 Mon Sep 17 00:00:00 2001 From: Robert Hancock Date: Tue, 18 Jan 2022 15:41:32 -0600 Subject: [PATCH] net: axienet: increase default TX ring size to 128 With previous changes to make the driver handle the TX ring size more correctly, the default TX ring size of 64 appears to significantly bottleneck TX performance to around 600 Mbps on a 1 Gbps link on ZynqMP. Increasing this to 128 seems to bring performance up to near line rate and shouldn't cause excess bufferbloat (this driver doesn't yet support modern byte-based queue management). Fixes: 8a3b7a252dca9 ("drivers/net/ethernet/xilinx: added Xilinx AXI Ethernet driver") Signed-off-by: Robert Hancock Signed-off-by: David S. Miller diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index b4f42ee9b75d..377c94ec2486 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -41,7 +41,7 @@ #include "xilinx_axienet.h" /* Descriptors defines for Tx and Rx DMA */ -#define TX_BD_NUM_DEFAULT 64 +#define TX_BD_NUM_DEFAULT 128 #define RX_BD_NUM_DEFAULT 1024 #define TX_BD_NUM_MIN (MAX_SKB_FRAGS + 1) #define TX_BD_NUM_MAX 4096