Description of problem: I created a new guest, and then set the network to Host Device p5p1 : MACVTAP, and Source Mode : Bridge. Then the host lockups/freezes/panics inmediatelly after starting the guest. Host serial console output: dic 04 20:35:15 stark.espada libvirtd[598]: No se encontraron los metadatos:...e dic 04 20:35:31 stark.espada kernel: device p5p1 entered promiscuous mode dic 04 20:35:31 stark.espada NetworkManager[572]: <info> (macvtap0): link con... dic 04 20:35:31 stark.espada NetworkManager[572]: <info> (macvtap0): carrier ... dic 04 20:35:31 stark.espada NetworkManager[572]: <info> (macvtap0): new Macv... dic 04 20:35:31 stark.espada NetworkManager[572]: <info> (macvtap0): exported... dic 04 20:35:31 stark.espada NetworkManager[572]: <info> (macvtap0): No exist... dic 04 20:35:31 stark.espada kernel: tun: Universal TUN/TAP device driver, 1.6 dic 04 20:35:31 stark.espada kernel: tun: (C) 1999-2004 Max Krasnyansky <ma...m> dic 04 20:35:31 stark.espada dbus-daemon[503]: dbus[503]: [system] Activatin...' dic 04 20:35:31 stark.espada dbus[503]: [system] Activating via systemd: ser...' dic 04 20:35:31 stark.espada systemd[1]: Starting Virtual Machine and Contai.... dic 04 20:35:31 stark.espada systemd[1]: Created slice Virtual Machine and C.... dic 04 20:35:31 stark.espada systemd[1]: Starting Virtual Machine and Contai.... dic 04 20:35:31 stark.espada dbus-daemon[503]: dbus[503]: [system] Successfu...' dic 04 20:35:31 stark.espada dbus[503]: [system] Successfully activated serv...' dic 04 20:35:31 stark.espada systemd[1]: Started Virtual Machine and Contain.... dic 04 20:35:31 stark.espada systemd[1]: Starting Virtual Machine qemu-FNEXT.... dic 04 20:35:31 stark.espada systemd-machined[1607]: New machine qemu-FNEXT-T... dic 04 20:35:31 stark.espada systemd[1]: Started Virtual Machine qemu-FNEXT-.... [ 660.131528] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 664.121017] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 664.145031] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 688.141984] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 692.131474] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 692.155486] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 697.495477] INFO: rcu_sched self-detected stall on CPU[ 697.497479] INFO: rcu_sched detected stalls on CPUs/tasks: [ 724.143437] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 724.155442] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 724.167449] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 752.153910] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 752.165915] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 752.177924] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 780.164386] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 780.176391] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 780.188399] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 808.174864] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 808.186869] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 808.198876] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 836.185343] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 836.197348] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 836.209356] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 864.195824] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 864.207828] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 864.219836] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 877.567827] INFO: rcu_sched self-detected stall on CPU[ 877.569828] INFO: rcu_sched detected stalls on CPUs/tasks: [ 904.210796] BUG: soft lockup - CPU#0 stuck for 23s! [qemu-system-x86:1610] [ 904.222801] BUG: soft lockup - CPU#1 stuck for 23s! [migration/1:12] [ 904.234809] BUG: soft lockup - CPU#2 stuck for 23s! [migration/2:17] [ 932.221277] BUG: soft lockup - CPU#0 stuck for 23s! [qemu-system-x86:1610] [ 932.233282] BUG: soft lockup - CPU#1 stuck for 23s! [migration/1:12] [ 932.245290] BUG: soft lockup - CPU#2 stuck for 23s! [migration/2:17] [ 960.231758] BUG: soft lockup - CPU#0 stuck for 23s! [qemu-system-x86:1610] [ 960.243763] BUG: soft lockup - CPU#1 stuck for 23s! [migration/1:12] [ 960.255771] BUG: soft lockup - CPU#2 stuck for 23s! [migration/2:17] [ 988.242240] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 988.254245] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 988.266253] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 1016.252722] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 1016.264726] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 1016.276734] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 1044.263203] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 1044.275208] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 1044.287215] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 1057.641209] INFO: rcu_sched self-detected stall on CPU[ 1057.642210] INFO: rcu_sched detected stalls on CPUs/tasks: [ 1084.278177] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 1084.290182] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 1084.302189] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 1112.288658] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 1112.300663] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 1112.312671] BUG: soft lockup - CPU#2 stuck for 22s! [migration/2:17] [ 1140.299140] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-x86:1610] [ 1140.311145] BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:12] [ 1140.323153] BUG: soft lockup - CPU#2 stuck for 23s! [migration/2:17] [ 1168.309622] BUG: soft lockup - CPU#0 stuck for 23s! [qemu-system-x86:1610] [ 1168.321627] BUG: soft lockup - CPU#1 stuck for 23s! [migration/1:12] [ 1168.333634] BUG: soft lockup - CPU#2 stuck for 23s! [migration/2:17] [ 1196.320103] BUG: soft lockup - CPU#0 stuck for 23s! [qemu-system-x86:1610] [ 1196.332108] BUG: soft lockup - CPU#1 stuck for 23s! [migration/1:12] [ 1196.344116] BUG: soft lockup - CPU#2 stuck for 23s! [migration/2:17] [ 1224.330585] BUG: soft lockup - CPU#0 stuck for 23s! [qemu-system-x86:1610] [ 1224.342590] BUG: soft lockup - CPU#1 stuck for 23s! [migration/1:12] [ 1224.354598] BUG: soft lockup - CPU#2 stuck for 23s! [migration/2:17] [ 1237.712592] INFO: rcu_sched self-detected stall on CPU[ 1237.714594] INFO: rcu_sched detected stalls on CPUs/tasks: I rebooted and changed the newtwork back to Virtual Network 'default': NAT I did not encountered any issue, the guest booted right into Anaconda (F20fTC4). Version-Release number of selected component (if applicable): [root@stark ~]# yum list installed '*qemu*' Loaded plugins: langpacks, refresh-packagekit Installed Packages ipxe-roms-qemu.noarch 20130517-3.gitc4bce43.fc20 @fedora libvirt-daemon-driver-qemu.x86_64 1.1.3.1-2.fc20 @fedora qemu-common.x86_64 2:1.6.1-2.fc20 @fedora qemu-guest-agent.x86_64 2:1.6.1-2.fc20 @anaconda qemu-img.x86_64 2:1.6.1-2.fc20 @fedora qemu-kvm.x86_64 2:1.6.1-2.fc20 @fedora qemu-system-x86.x86_64 2:1.6.1-2.fc20 @fedora # yum list installed '*libvirt*' Loaded plugins: langpacks, refresh-packagekit Installed Packages libvirt-client.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-config-network.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-driver-interface.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-driver-network.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-driver-nodedev.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-driver-nwfilter.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-driver-qemu.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-driver-secret.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-driver-storage.x86_64 1.1.3.1-2.fc20 @fedora libvirt-daemon-kvm.x86_64 1.1.3.1-2.fc20 @fedora libvirt-glib.x86_64 0.1.7-2.fc20 @fedora libvirt-python.x86_64 1.1.3.1-2.fc20 @fedora [root@stark ~]# uname -r 3.11.10-300.fc20.x86_64 How reproducible: always Steps to Reproduce: 1. Start a guest with the network card setup as macvtap: bridge Actual results: host either crashes or freezes Expected results: Additional info: In the past i also reported problems with macvtap and bridge.
# lspci -nn | grep Eth 01:09.0 Ethernet controller [0200]: Sundance Technology Inc / IC Plus Corp IC Plus IP100A Integrated 10/100 Ethernet MAC + PHY [13f0:0200] (rev 31) 06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06) I was using 06:00.0 (p5p1) with the guest.
This is the same as Bug 1025770, and effects all kernels since at least 3.11.6 in Fedora 19. As noted in that BZ, I've also tested with the latest rawhide kernel (3.13.0.something) and it's still broken there. It is definitely a problem with the kernel, as the older kernel with newer qemu behaves properly. Although the other BZ is currently marked as F19, I'm planning to change that, since it is in F19, F20 and rawhide. *** This bug has been marked as a duplicate of bug 1025770 ***