Received: by 2002:a25:c593:0:0:0:0:0 with SMTP id v141csp819644ybe; Thu, 19 Sep 2019 04:25:35 -0700 (PDT) X-Google-Smtp-Source: APXvYqyVPq49HAX1igFGDCiY+NSKiO7/ti+HNOZ7dGplhJL8w0Exdkmt7360wojezegvfyoE3sUM X-Received: by 2002:a05:6402:2cb:: with SMTP id b11mr15535056edx.285.1568892335031; Thu, 19 Sep 2019 04:25:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1568892335; cv=none; d=google.com; s=arc-20160816; b=y0XJynUAxo9kNZ11AkssF4qVmjWQIdYZTpsDMLAVkU5+z7vvTZSzXBOfds4IOQ4GSx gjQ6fgnzpo/rbdnu1zYkENiQ1HSCEH5TamgYCEjZmdBfq6LHN8l9uL58zeRIsmP3Cinf HH9CfiT72JZ7slj8n9i5vnSqouPHrczVtkqu5wJ93fPvkYwtEbsaEuGEDrj28wIAaY6Q 7ryClyeIVUhNF9QKIl1RxqmZFbpU1H+/botatwBSSFzoi/dZVGKobrZMV9RYq1Z/IseD gL40y+nS4gRpl14pMNq8AC72tUHtodurZrdekfHikwi/XNvbTWn3WRsZZBjdjVokizDl dk5w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:content-disposition :mime-version:mail-followup-to:message-id:subject:to:from:date; bh=3/3+F/OCci4HPtSMdrfYur7WtFpGmfgdLXjL2VQDC64=; b=O0d1xgFMtnpLqfNosPTrdvyvsg450eVZ4TRqyk5TA/rqDYdCt8VdMqGXZtHa3RhYF9 QSwXIS45d+s+x9zWZVomTIsexN1YnK4ZIpIF3lkYTrzf/IUpVTTaCcsCBZ6oApuQwjA4 JCWSrade0p3c0S0Drp1dL9IsJwTvEusZE8/2+9h2YC9URxW4FEj7PeXF7/IAaOIhu7KX 1QeLBm3fWMtzUWRacqT8+ZJjh8/rjFOhMIHbfdG+4hnAOuLQsiCJp9u7IqWgZdOdFgKH b1lBDn+dXETzDGK2aaZy98wwOZp5X+kzMkd/ictXGgXPABn3txTxWzKuacBv28uqy5M6 1jAw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id x8si5751921edd.282.2019.09.19.04.24.42; Thu, 19 Sep 2019 04:25:35 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731897AbfISI4C (ORCPT + 99 others); Thu, 19 Sep 2019 04:56:02 -0400 Received: from relay-b03.edpnet.be ([212.71.1.220]:55229 "EHLO relay-b03.edpnet.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725887AbfISI4B (ORCPT ); Thu, 19 Sep 2019 04:56:01 -0400 X-Greylist: delayed 899 seconds by postgrey-1.27 at vger.kernel.org; Thu, 19 Sep 2019 04:56:00 EDT X-ASG-Debug-ID: 1568882456-0a88186e203bfccb0001-xx1T2L Received: from zotac.vandijck-laurijssen.be (77.109.114.181.adsl.dyn.edpnet.net [77.109.114.181]) by relay-b03.edpnet.be with ESMTP id zku8b7QnzezzfzdY for ; Thu, 19 Sep 2019 10:40:56 +0200 (CEST) X-Barracuda-Envelope-From: dev.kurt@vandijck-laurijssen.be X-Barracuda-Effective-Source-IP: 77.109.114.181.adsl.dyn.edpnet.net[77.109.114.181] X-Barracuda-Apparent-Source-IP: 77.109.114.181 Received: from x1.vandijck-laurijssen.be (x1.vandijck-laurijssen.be [IPv6:fd01::1a1d:eaff:fe02:d339]) by zotac.vandijck-laurijssen.be (Postfix) with ESMTPSA id BA9E89DD3E5 for ; Thu, 19 Sep 2019 10:40:56 +0200 (CEST) Date: Thu, 19 Sep 2019 10:40:53 +0200 From: Kurt Van Dijck To: linux-kernel@vger.kernel.org Subject: Question on priorities with CAN Message-ID: <20190919084053.GB1446@x1.vandijck-laurijssen.be> X-ASG-Orig-Subj: Question on priorities with CAN Mail-Followup-To: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.5.22 (2013-10-16) X-Barracuda-Connect: 77.109.114.181.adsl.dyn.edpnet.net[77.109.114.181] X-Barracuda-Start-Time: 1568882456 X-Barracuda-URL: https://212.71.1.220:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at edpnet.be X-Barracuda-Scan-Msg-Size: 424 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.8881 1.0000 3.0996 X-Barracuda-Spam-Score: 3.10 X-Barracuda-Spam-Status: No, SCORE=3.10 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=7.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.76587 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hey, I work on a beaglebone-like board using the AM335x can chip, with an RT kernel. The can irq task is by default rt prio 50. I have a process running on rt prio 10 using CAN_RAW socket. I see that softirqd runs on regular timeslicing. Do CAN frames need to pass through the softirqd in order to arrive on my process? I would need to elevate the softirqd's rt prio also in that case? Kind regards, Kurt