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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 C25A5CA9EBB for ; Thu, 24 Oct 2019 14:12:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9DD8121872 for ; Thu, 24 Oct 2019 14:12:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388650AbfJXOMW (ORCPT ); Thu, 24 Oct 2019 10:12:22 -0400 Received: from mx2.suse.de ([195.135.220.15]:42040 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2502740AbfJXOMT (ORCPT ); Thu, 24 Oct 2019 10:12:19 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 733B2B28E; Thu, 24 Oct 2019 14:12:17 +0000 (UTC) Date: Thu, 24 Oct 2019 16:12:16 +0200 From: Daniel Wagner To: Sebastian Andrzej Siewior Cc: Jakub Kicinski , UNGLinuxDriver@microchip.com, netdev@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, Woojung Huh , Marc Zyngier , Andrew Lunn , Stefan Wahren , Jisheng Zhang , Thomas Gleixner Subject: Re: [PATCH] net: usb: lan78xx: Use phy_mac_interrupt() for interrupt handling Message-ID: <20191024141216.wz2dcdxy4mrl2q5a@beryllium.lan> References: <20191018082817.111480-1-dwagner@suse.de> <20191018131532.dsfhyiilsi7cy4cm@linutronix.de> <20191022101747.001b6d06@cakuba.netronome.com> <20191023074719.gcov5xfrcvns5tlg@beryllium.lan> <20191023080640.zcw2f2v7fpanoewm@beryllium.lan> <20191024104317.32bp32krrjmfb36p@linutronix.de> <20191024110610.lwwy75dkgwjdxml6@beryllium.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191024110610.lwwy75dkgwjdxml6@beryllium.lan> User-Agent: NeoMutt/20180716 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Thu, Oct 24, 2019 at 01:06:10PM +0200, Daniel Wagner wrote: > [ 3.719647] lan78xx 1-1.1.1:1.0 (unnamed net_device) (uninitialized): deferred multicast write 0x00007ca0 > [ 3.861125] lan78xx 1-1.1.1:1.0 (unnamed net_device) (uninitialized): No External EEPROM. Setting MAC Speed > [ 3.872500] libphy: lan78xx-mdiobus: probed > [ 3.883927] lan78xx 1-1.1.1:1.0 (unnamed net_device) (uninitialized): registered mdiobus bus usb-001:004 > [ 3.893600] lan78xx 1-1.1.1:1.0 (unnamed net_device) (uninitialized): phydev->irq = 79 > [ 4.274367] random: crng init done > [ 4.929478] lan78xx 1-1.1.1:1.0 eth0: receive multicast hash filter > [ 4.935922] lan78xx 1-1.1.1:1.0 eth0: deferred multicast write 0x00007ca2 > [ 6.537962] lan78xx 1-1.1.1:1.0 eth0: PHY INTR: 0x00020000 > [ 6.549129] lan78xx 1-1.1.1:1.0 eth0: speed: 1000 duplex: 1 anadv: 0x05e1 anlpa: 0xc1e1 > [ 6.557293] lan78xx 1-1.1.1:1.0 eth0: rx pause disabled, tx pause disabled > [ 6.572581] Sending DHCP requests ..., OK > [ 12.200693] IP-Config: Got DHCP answer from 192.168.19.2, my address is 192.168.19.53 > [ 12.208654] IP-Config: Complete: > [ 12.211929] device=eth0, hwaddr=b8:27:eb:85:c7:c9, ipaddr=192.168.19.53, mask=255.255.255.0, gw=192.168.19.1 > [ 12.222350] host=192.168.19.53, domain=, nis-domain=(none) > [ 12.228364] bootserver=192.168.19.2, rootserver=192.168.19.2, rootpath= > [ 12.228369] nameserver0=192.168.19.2 > [ 12.239812] ALSA device list: > [ 12.242839] No soundcards found. > [ 12.256896] VFS: Mounted root (nfs filesystem) on device 0:19. > [ 12.263501] devtmpfs: mounted > [ 12.273037] Freeing unused kernel memory: 5504K > [ 12.277769] Run /sbin/init as init process Sebastians suggested to try the RPi kernel. The rpi-5.2.y kernel behaves exactly the same. That is one PHY interrupt and later on NFS timeouts. According their website the current shipped RPi kernel is in version 4.18. Here is what happends with rpi-4.18.y: [ 3.359058] lan78xx 1-1.1.1:1.0 (unnamed net_device) (uninitialized): deferred multicast write 0x00007ca0 [ 3.500910] lan78xx 1-1.1.1:1.0 (unnamed net_device) (uninitialized): No External EEPROM. Setting MAC Speed [ 3.517693] libphy: lan78xx-mdiobus: probed [ 3.521970] lan78xx 1-1.1.1:1.0 (unnamed net_device) (uninitialized): registered mdiobus bus usb-001:004 [ 3.532219] lan78xx 1-1.1.1:1.0 eth0: phydev->irq = 150 [ 3.843609] lan78xx 1-1.1.1:1.0 eth0: receive multicast hash filter [ 3.850085] lan78xx 1-1.1.1:1.0 eth0: deferred multicast write 0x00007ca2 [ 3.876059] random: crng init done [ 6.563736] lan78xx 1-1.1.1:1.0 eth0: PHY INTR: 0x00020000 [ 6.569331] lan78xx 1-1.1.1:1.0 eth0: PHY INTR: 0x00020000 [ 6.582759] lan78xx 1-1.1.1:1.0 eth0: speed: 1000 duplex: 1 anadv: 0x05e1 anlpa: 0xc1e1 [ 6.590889] lan78xx 1-1.1.1:1.0 eth0: rx pause disabled, tx pause disabled [ 6.603222] Sending DHCP requests .. [ 12.323251] Voltage normalised (0x00000000) [ 13.723234] ., OK [ 13.765259] IP-Config: Got DHCP answer from 192.168.19.2, my address is 192.168.19.53 [ 13.773250] IP-Config: Complete: [ 13.776552] device=eth0, hwaddr=b8:27:eb:85:c7:c9, ipaddr=192.168.19.53, mask=255.255.255.0, gw=192.168.19.1 [ 13.786990] host=192.168.19.53, domain=, nis-domain=(none) [ 13.793029] bootserver=192.168.19.2, rootserver=192.168.19.2, rootpath= [ 13.793035] nameserver0=192.168.19.2 There are no NFS timeouts and commands like 'apt update' work reasoble fast. So no long delays or hangs. Time to burn this hardware.