From patchwork Tue Jan 7 05:47:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 190761 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=-3.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=no 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 2BC4EC33C99 for ; Tue, 7 Jan 2020 05:48:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F2B1B2075A for ; Tue, 7 Jan 2020 05:48:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="oC97eC5T" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725965AbgAGFr5 (ORCPT ); Tue, 7 Jan 2020 00:47:57 -0500 Received: from mail-pf1-f194.google.com ([209.85.210.194]:43139 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725835AbgAGFr5 (ORCPT ); Tue, 7 Jan 2020 00:47:57 -0500 Received: by mail-pf1-f194.google.com with SMTP id x6so26939016pfo.10 for ; Mon, 06 Jan 2020 21:47:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=a5znaXZKlBTVMs68+b0GTeS4YJ7CQCUkofQQyekYzV4=; b=oC97eC5TLPVr7Jrsjlrnmc83ooVvbjeUIh3ZiqGqLoKtjrO4Ij8a1NAl9kCzOIwEYi 6QeOXid2yQ70AjpokUwCI3BpCoRzJMahrUsFwLSC5xjTzfsNgMSolD8NCiEm9Vc3H2St ue4nnXeoi3Kbj+VXtdxCV0QwUbhqMSAj6tWsxwDwsHM67piQHOz98uWvEGo37Fetg33f W6k/zzB9NE6gCR3VKPVP9cQEcNnCUfYu8nY28qAnCKerlVIjSa4TeoYkvzF40FQvhOg+ X8DFm1JQSs5iTA6seyPXtPnMDI8t0rUvSu9nNkHqLitJfH9/qIaWrVrBwTJUesTuEBX6 EH6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=a5znaXZKlBTVMs68+b0GTeS4YJ7CQCUkofQQyekYzV4=; b=SxGsGBIdsa9zIDUnp7nLEWL6eKh3jdfkpVWKOznhfK3KIsJjDag0EWXHK7JUVmkggm 9NpgC5EeapnzLBSGo9fuMd6Z7rnjTtNjGRyVUpyOGzS3xSws6Apyo+EEwrb7GQcuCO38 gSKvsN1FZ9q3HiUpvtzJjTHjUYQ52z41KRAm/0jxfJw+dJoO0iQ0pfwRpPjWBgFoNDP5 b44P9oHOVhi5duKioV4skuJN23Hr1MUryjpEuFBHgOtHi+PxBeznmI0TgUoXOI6Ny/rG T91McaWzdGrUT8AcHHObOdBsUE+gh38C5IsMPND3MZfoMVIi1ysxwGqT6cZpzMzO0MYz zwnw== X-Gm-Message-State: APjAAAUukgh2idW0YJBCoepU4VsopEeQaiAe2Rr3M2PpSMQPb3JyouWI WlrbvOE6dThV/nkaQ1qDBE271Q== X-Google-Smtp-Source: APXvYqy2leZLuc9tAwF1AB/pqhfsi3mK/YIK7ZOzGsgaxNOLvQ9JQ/qFXE8LAge+Av32D8Bq/3Tvww== X-Received: by 2002:aa7:9115:: with SMTP id 21mr81653278pfh.224.1578376076558; Mon, 06 Jan 2020 21:47:56 -0800 (PST) Received: from localhost.localdomain (104-188-17-28.lightspeed.sndgca.sbcglobal.net. [104.188.17.28]) by smtp.gmail.com with ESMTPSA id k21sm67129177pfa.63.2020.01.06.21.47.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jan 2020 21:47:55 -0800 (PST) From: Bjorn Andersson To: "David S. Miller" Cc: Arun Kumar Neelakantam , Chris Lew , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v3 0/5] QRTR flow control improvements Date: Mon, 6 Jan 2020 21:47:08 -0800 Message-Id: <20200107054713.3909260-1-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In order to prevent overconsumption of resources on the remote side QRTR implements a flow control mechanism. Move the handling of the incoming confirm_rx to the receiving process to ensure incoming flow is controlled. Then implement outgoing flow control, using the recommended algorithm of counting outstanding non-confirmed messages and blocking when hitting a limit. The last three patches refactors the node assignment and port lookup, in order to remove the worker in the receive path. Bjorn Andersson (5): net: qrtr: Move resume-tx transmission to recvmsg net: qrtr: Implement outgoing flow control net: qrtr: Migrate node lookup tree to spinlock net: qrtr: Make qrtr_port_lookup() use RCU net: qrtr: Remove receive worker net/qrtr/qrtr.c | 314 +++++++++++++++++++++++++++++++++++++----------- 1 file changed, 242 insertions(+), 72 deletions(-)