From patchwork Tue Nov 23 17:18:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 12634855 X-Patchwork-Delegate: kuba@kernel.org 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 96187C4332F for ; Tue, 23 Nov 2021 17:24:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239286AbhKWR14 (ORCPT ); Tue, 23 Nov 2021 12:27:56 -0500 Received: from mga06.intel.com ([134.134.136.31]:14444 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239226AbhKWR1y (ORCPT ); Tue, 23 Nov 2021 12:27:54 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10177"; a="295876961" X-IronPort-AV: E=Sophos;i="5.87,258,1631602800"; d="scan'208";a="295876961" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Nov 2021 09:20:18 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,258,1631602800"; d="scan'208";a="571128223" Received: from irvmail001.ir.intel.com ([10.43.11.63]) by fmsmga004.fm.intel.com with ESMTP; 23 Nov 2021 09:20:15 -0800 Received: from newjersey.igk.intel.com (newjersey.igk.intel.com [10.102.20.203]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id 1ANHK9Ql024401; Tue, 23 Nov 2021 17:20:14 GMT From: Alexander Lobakin To: intel-wired-lan@lists.osuosl.org Cc: Alexander Lobakin , Tony Nguyen , Jesse Brandeburg , Maciej Fijalkowski , Michal Swiatkowski , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 7/9] igc: switch to napi_build_skb() Date: Tue, 23 Nov 2021 18:18:38 +0100 Message-Id: <20211123171840.157471-8-alexandr.lobakin@intel.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211123171840.157471-1-alexandr.lobakin@intel.com> References: <20211123171840.157471-1-alexandr.lobakin@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org napi_build_skb() reuses per-cpu NAPI skbuff_head cache in order to save some cycles on freeing/allocating skbuff_heads on every new Rx or completed Tx. igc driver runs Tx completion polling cycle right before the Rx one and uses napi_consume_skb() to feed the cache with skbuff_heads of completed entries, so it's never empty and always warm at that moment. Switch to the napi_build_skb() to relax mm pressure on heavy Rx. Signed-off-by: Alexander Lobakin Reviewed-by: Michal Swiatkowski Tested-by: Nechama Kraus --- drivers/net/ethernet/intel/igc/igc_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.33.1 diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 8e448288ee26..8b13a61ea5c9 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -1729,7 +1729,7 @@ static struct sk_buff *igc_build_skb(struct igc_ring *rx_ring, net_prefetch(va); /* build an skb around the page buffer */ - skb = build_skb(va - IGC_SKB_PAD, truesize); + skb = napi_build_skb(va - IGC_SKB_PAD, truesize); if (unlikely(!skb)) return NULL;