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=-3.1 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=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 72099C28CC0 for ; Fri, 31 May 2019 01:17:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4AE5A26163 for ; Fri, 31 May 2019 01:17:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="AXivDdUX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726862AbfEaBR6 (ORCPT ); Thu, 30 May 2019 21:17:58 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:36517 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726741AbfEaBR6 (ORCPT ); Thu, 30 May 2019 21:17:58 -0400 Received: by mail-pg1-f193.google.com with SMTP id a3so3031366pgb.3 for ; Thu, 30 May 2019 18:17:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=lqXIB5VYrvs6jzaa1g5z58dzubUn6chXga4pIoclBMk=; b=AXivDdUXnwZ3DRv77pdpJFBVOOGHV1N7WPHdh9KEJTOWB3mZHDRvAnvsgTK02YurLB vnM1t3CvOCRY5Bk/K9EAvON7MrmcrcdjRV8WyVkSRwh1QVtmWXEbTPR/LuREG/7IRHNM vizi3cLSebt1yXXSvgW3YrJmFYDVya3Pdf0EvelPlIUSvOX9dVqYrvRyiIGXkmqd1CEl HtLEqvoVqfMhZrpIx/ReMAgY0822LS5+V6sOYtSSsfN/G2aviSY/y7laA2a/zM20uOwF wnBVbIq4UFV22XROuPjXI1gQ20y+6FC1nBDuha4RERDo8jynH7+WXL4Dk6xvNWWmCvmL zI6w== 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; bh=lqXIB5VYrvs6jzaa1g5z58dzubUn6chXga4pIoclBMk=; b=oz2UeNWXDcS6PK2cHtzLo/Yy0LJ3OlIikhBvUBIFiCSj9T3oKBM6867QmN2XaSGG/S tO/Z/Vp7EzDuAHgPit3CYsznQ+LOlxrpx6sIujo13qhavjVe7wiLmOtuWi7NBKJGQ4vt z8/VcdpWmHStSzgv29zfQwEyqF+s9lqPKNUhFPUMAtwlraQYeqIGjEhMAyxGOJqhxYp0 7uvZNwT3mVzv/Yz3YW7XlIUYPC/AT2/2xfwdJnJry0BTrZXRwjuR9m3Q23zaJ9IYl79q qahmpqX1WxSwEIxAmucXu71PjYxJA0nWmkgh2krKvfCMEb/d0tkqpwWfuqNBT43w9JY6 bjgA== X-Gm-Message-State: APjAAAWK4Vl9gvElXd1OgLnFa+a7gfjMIfB83ToBvy4IguyaKFbAWuDP lGhUkFVNz5/q9qiSmjQuSQTG6A== X-Google-Smtp-Source: APXvYqwhmKCBjnssnPJFBip10hmLkNMYYCUmPPrBrlyQG6qHzxD+sqJ+lptQQWwYUYt4XCmVMKfY/A== X-Received: by 2002:a63:ed16:: with SMTP id d22mr6374376pgi.35.1559265477220; Thu, 30 May 2019 18:17:57 -0700 (PDT) Received: from localhost.localdomain (104-188-17-28.lightspeed.sndgca.sbcglobal.net. [104.188.17.28]) by smtp.gmail.com with ESMTPSA id j20sm1819042pff.183.2019.05.30.18.17.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 30 May 2019 18:17:56 -0700 (PDT) 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 v2 0/5] QRTR flow control improvements Date: Thu, 30 May 2019 18:17:48 -0700 Message-Id: <20190531011753.11840-1-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.18.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 | 308 +++++++++++++++++++++++++++++++++++++----------- 1 file changed, 239 insertions(+), 69 deletions(-) -- 2.18.0