From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============7120230517461171580==" MIME-Version: 1.0 From: Huang, Ying To: lkp@lists.01.org Subject: Re: [net] 21bb45b419: kmsg.unregister_netdevice:waiting_for_br-lan_to_become_free.Usage_count= Date: Wed, 02 Mar 2016 16:00:58 +0800 Message-ID: <87y4a1pav9.fsf@yhuang-dev.intel.com> In-Reply-To: <56D49603.4010900@cumulusnetworks.com> List-Id: --===============7120230517461171580== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable David Ahern writes: > On 2/29/16 12:50 AM, kernel test robot wrote: >> FYI, we noticed the below changes on >> >> https://github.com/0day-ci/linux David-Ahern/net-ipv6-Make-address-flus= hing-on-ifdown-optional/20160214-062626 >> commit 21bb45b419243ee4d9d74f1d1f97164fbfc481c3 ("net: ipv6: Make addres= s flushing on ifdown optional") >> >> >> [ 136.160531] unregister_netdevice: waiting for br-lan to become free. = Usage count =3D 1 >> > > How do I get the series of commands run? From the logs it looks like > there is a creation of a bridge, eth0 enslavement, admin down on > bridge and then delete of the bridge. When I run those commands in a > VM I do not hit the usage count of 1, so I am clearly missing some > commands. The command line to run qemu is as follow: qemu-system-x86_64 -enable-kvm -kernel /pkg/linux/x86_64-randconfig-n0-0227= 1436/gcc-5/21bb45b419243ee4d9d74f1d1f97164fbfc481c3/vmlinuz-4.5.0-rc2-00420= -g21bb45b -append 'root=3D/dev/ram0 user=3Dlkp job=3D/lkp/scheduled/vm-clie= nt3-openwrt-ia32-2/rand_boot-1-openwrt-i386.cgz-x86_64-randconfig-n0-022714= 36-21bb45b419243ee4d9d74f1d1f97164fbfc481c3-20160228-50262-1pt11n1-0.yaml A= RCH=3Dx86_64 kconfig=3Dx86_64-randconfig-n0-02271436 branch=3Dlinux-devel/d= evel-hourly-2016022600 commit=3D21bb45b419243ee4d9d74f1d1f97164fbfc481c3 BO= OT_IMAGE=3D/pkg/linux/x86_64-randconfig-n0-02271436/gcc-5/21bb45b419243ee4d= 9d74f1d1f97164fbfc481c3/vmlinuz-4.5.0-rc2-00420-g21bb45b max_uptime=3D600 R= ESULT_ROOT=3D/result/boot/1/vm-client3-openwrt-ia32/openwrt-i386.cgz/x86_64= -randconfig-n0-02271436/gcc-5/21bb45b419243ee4d9d74f1d1f97164fbfc481c3/0 LK= P_SERVER=3Dinn earlyprintk=3DttyS0,115200 systemd.log_level=3Derr debug api= c=3Ddebug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=3D100 panic= =3D-1 softlockup_panic=3D1 nmi_watchdog=3Dpanic oops=3Dpanic load_ramdisk= =3D2 prompt_ramdisk=3D0 console=3DttyS0,115200 console=3Dtty0 vga=3Dnormal = rw ip=3D::::vm-client3-openwrt-ia32-2::dhcp drbd.minor_count=3D8' -initrd = /fs/sdb6/initrd-vm-client3-openwrt-ia32-2 -m 192 -smp 1 -device e1000,netde= v=3Dnet0 -netdev user,id=3Dnet0 -boot order=3Dnc -no-reboot -watchdog i6300= esb -rtc base=3Dlocaltime -drive file=3D/fs/sdb6/disk0-vm-client3-openwrt-i= a32-2,media=3Ddisk,if=3Dvirtio -drive file=3D/fs/sdb6/disk1-vm-client3-open= wrt-ia32-2,media=3Ddisk,if=3Dvirtio -pidfile /dev/shm/kboot/pid-vm-client3-= openwrt-ia32-2 -serial file:/dev/shm/kboot/serial-vm-client3-openwrt-ia32-2= -daemonize -display none -monitor null The root file system used for test can be downloaded in: https://github.com/fengguang/reproduce-kernel-bug/tree/master/initrd The one used for test should be yocto i386 root image. Best Regards, Huang, Ying > Thanks for the report, > David > _______________________________________________ > LKP mailing list > LKP(a)lists.01.org > https://lists.01.org/mailman/listinfo/lkp --===============7120230517461171580==-- From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752956AbcCBIBE (ORCPT ); Wed, 2 Mar 2016 03:01:04 -0500 Received: from mga02.intel.com ([134.134.136.20]:9358 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752032AbcCBIBB convert rfc822-to-8bit (ORCPT ); Wed, 2 Mar 2016 03:01:01 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,527,1449561600"; d="scan'208";a="924973515" From: "Huang\, Ying" To: David Ahern Cc: 0day robot , , LKML Subject: Re: [LKP] [lkp] [net] 21bb45b419: kmsg.unregister_netdevice:waiting_for_br-lan_to_become_free.Usage_count= References: <87si0byk5w.fsf@yhuang-dev.intel.com> <56D49603.4010900@cumulusnetworks.com> Date: Wed, 02 Mar 2016 16:00:58 +0800 In-Reply-To: <56D49603.4010900@cumulusnetworks.com> (David Ahern's message of "Mon, 29 Feb 2016 11:03:31 -0800") Message-ID: <87y4a1pav9.fsf@yhuang-dev.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=ascii Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org David Ahern writes: > On 2/29/16 12:50 AM, kernel test robot wrote: >> FYI, we noticed the below changes on >> >> https://github.com/0day-ci/linux David-Ahern/net-ipv6-Make-address-flushing-on-ifdown-optional/20160214-062626 >> commit 21bb45b419243ee4d9d74f1d1f97164fbfc481c3 ("net: ipv6: Make address flushing on ifdown optional") >> >> >> [ 136.160531] unregister_netdevice: waiting for br-lan to become free. Usage count = 1 >> > > How do I get the series of commands run? From the logs it looks like > there is a creation of a bridge, eth0 enslavement, admin down on > bridge and then delete of the bridge. When I run those commands in a > VM I do not hit the usage count of 1, so I am clearly missing some > commands. The command line to run qemu is as follow: qemu-system-x86_64 -enable-kvm -kernel /pkg/linux/x86_64-randconfig-n0-02271436/gcc-5/21bb45b419243ee4d9d74f1d1f97164fbfc481c3/vmlinuz-4.5.0-rc2-00420-g21bb45b -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-client3-openwrt-ia32-2/rand_boot-1-openwrt-i386.cgz-x86_64-randconfig-n0-02271436-21bb45b419243ee4d9d74f1d1f97164fbfc481c3-20160228-50262-1pt11n1-0.yaml ARCH=x86_64 kconfig=x86_64-randconfig-n0-02271436 branch=linux-devel/devel-hourly-2016022600 commit=21bb45b419243ee4d9d74f1d1f97164fbfc481c3 BOOT_IMAGE=/pkg/linux/x86_64-randconfig-n0-02271436/gcc-5/21bb45b419243ee4d9d74f1d1f97164fbfc481c3/vmlinuz-4.5.0-rc2-00420-g21bb45b max_uptime=600 RESULT_ROOT=/result/boot/1/vm-client3-openwrt-ia32/openwrt-i386.cgz/x86_64-randconfig-n0-02271436/gcc-5/21bb45b419243ee4d9d74f1d1f97164fbfc481c3/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-client3-openwrt-ia32-2::dhcp drbd.minor_count=8' -initrd /fs/sdb6/initrd-vm-client3-openwrt-ia32-2 -m 192 -smp 1 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdb6/disk0-vm-client3-openwrt-ia32-2,media=disk,if=virtio -drive file=/fs/sdb6/disk1-vm-client3-openwrt-ia32-2,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-client3-openwrt-ia32-2 -serial file:/dev/shm/kboot/serial-vm-client3-openwrt-ia32-2 -daemonize -display none -monitor null The root file system used for test can be downloaded in: https://github.com/fengguang/reproduce-kernel-bug/tree/master/initrd The one used for test should be yocto i386 root image. Best Regards, Huang, Ying > Thanks for the report, > David > _______________________________________________ > LKP mailing list > LKP@lists.01.org > https://lists.01.org/mailman/listinfo/lkp