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=-3.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 6DD65C04A6B for ; Wed, 8 May 2019 06:07:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E60620449 for ; Wed, 8 May 2019 06:07:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="LXuOtmF8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727151AbfEHGGt (ORCPT ); Wed, 8 May 2019 02:06:49 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:46981 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726082AbfEHGGs (ORCPT ); Wed, 8 May 2019 02:06:48 -0400 Received: by mail-pg1-f195.google.com with SMTP id t187so5427348pgb.13 for ; Tue, 07 May 2019 23:06:48 -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=VL6JgzPEvyYwDsgy9COt0nfgYdULxflvPEbEkBc3IBs=; b=LXuOtmF81sUb6ZqftugF9mg8zLPkFF5Kmi26fPIhKOx4T/pWiUvQjqhK7J9QrKYjf5 n0L3cd379N4tZNhYhLMS29uaRLnb+hPrQMXTJuXiuqJsxEl9WrJhMoQIZT2nldwlRf/u fvyRKP8iEMg0ZB70K0tObwNSVGEXSBZhkw41Ik3DEMREkcgqocf04AzspFl2nDWSBCjN /T7avC4+rkVAgpos82U/KkFG+LJmfqGrgNv4fEdjXERNzH10EUaMQpvs61HA+6KrxQtN hwHW81OnJWDhQiNH/oqP0tAeXTRiEISMJS18Jq0XEvWgTL0HirZFb0YSoe7TQx3TB1go QUaw== 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=VL6JgzPEvyYwDsgy9COt0nfgYdULxflvPEbEkBc3IBs=; b=GpV7GFy8k63ndlVMD6EIh3Qh0CcGUVhoqIipUpG7KCorkBnVJ7lWJ0+k+WEHRK7Ylf Ze9d30EzM7W+J4PEcF9LPkeRkitRmfj5aGhRwgchrR4yflszI1hzod2Lybav0ATxnB1T qq7vZAbWTs1bE70rt4t1fwfoDXsnxCQacRYgO0RtDsczIMXBlssYvi6dLCJBLm/cQnWS qSOT3/QqYrGHLoCn6XMAYQUbb0Y3cfnMA4szPoNCQnbXScgNyBJsZCDW8j+l7gX2Njya hhFIkuR6whoyL+4QqWBXRkJpTqzODrjvMPhIL57gDgvtzfwDFntgicaiQbLcpo5bLlo/ 8TWg== X-Gm-Message-State: APjAAAXv16oPE8zeN1ApxQYzzz4/1586p8xabLeCaltz4BXVIkb/g75r fHo3+VeHsiBLjfaYxobVEo1tfQ== X-Google-Smtp-Source: APXvYqxx2vFAgOmHdaHvQ8kGexENoX08edWIpPpZ1HgG4mkaX+MxpCauUS3la2l3ZMzylA+ka6qW/w== X-Received: by 2002:a65:628b:: with SMTP id f11mr43010659pgv.95.1557295607391; Tue, 07 May 2019 23:06:47 -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 t5sm2756130pgn.80.2019.05.07.23.06.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 07 May 2019 23:06:46 -0700 (PDT) From: Bjorn Andersson To: "David S. Miller" , Arun Kumar Neelakantam , Chris Lew Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH 0/5] QRTR flow control improvements Date: Tue, 7 May 2019 23:06:38 -0700 Message-Id: <20190508060643.30936-1-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.18.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@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 | 265 +++++++++++++++++++++++++++++++++++------------- 1 file changed, 196 insertions(+), 69 deletions(-) -- 2.18.0