Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.19 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19-vivid/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1421400 Title: stack trace on ppc64 kvm guest Status in linux package in Ubuntu: Incomplete Bug description: testing kvm with vivid guests, we're seeing stack traces in the majority (if not all) instances: [ 1.956634] irq 18: nobody cared (try booting with the "irqpoll" option) [ 1.956680] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-13-generic #14-Ubuntu [ 1.956728] Call Trace: [ 1.956748] [c00000001ffcfcb0] [c000000000a20a44] dump_stack+0x90/0xbc (unreliable) [ 1.956806] [c00000001ffcfce0] [c00000000012a590] __report_bad_irq+0x60/0x160 [ 1.956856] [c00000001ffcfd70] [c00000000012ae00] note_interrupt+0x340/0x3a0 [ 1.956905] [c00000001ffcfe10] [c000000000126f54] handle_irq_event_percpu+0x124/0x2b0 [ 1.956961] [c00000001ffcfed0] [c000000000127148] handle_irq_event+0x68/0xc0 [ 1.957010] [c00000001ffcff00] [c00000000012b734] handle_fasteoi_irq+0xe4/0x290 [ 1.957066] [c00000001ffcff30] [c0000000001260c8] generic_handle_irq+0x58/0x90 [ 1.957123] [c00000001ffcff60] [c000000000010ef0] __do_irq+0x80/0x190 [ 1.957172] [c00000001ffcff90] [c0000000000245b0] call_do_irq+0x14/0x24 [ 1.957221] [c00000001e683030] [c000000000011098] do_IRQ+0x98/0x140 [ 1.957270] [c00000001e683080] [c0000000000099b0] restore_check_irq_replay+0x2c/0x70 [ 1.957327] --- interrupt: 501 at arch_local_irq_restore+0x74/0x90 LR = arch_local_irq_restore+0x74/0x90 [ 1.957399] [c00000001e683370] [0000000000000002] 0x2 (unreliable) [ 1.957449] [c00000001e683390] [c0000000000b3434] __do_softirq+0xe4/0x410 [ 1.957498] [c00000001e683480] [c0000000000b3b38] irq_exit+0xf8/0x140 [ 1.957547] [c00000001e6834b0] [c00000000001f254] timer_interrupt+0xa4/0xe0 [ 1.957596] [c00000001e6834e0] [c0000000000099d8] restore_check_irq_replay+0x54/0x70 [ 1.957653] --- interrupt: 901 at arch_local_irq_restore+0x74/0x90 LR = arch_local_irq_restore+0x74/0x90 [ 1.957725] [c00000001e6837d0] [0000000000000010] 0x10 (unreliable) [ 1.957774] [c00000001e6837f0] [c000000000a156c4] _raw_spin_unlock_irqrestore+0x54/0xb0 [ 1.957831] [c00000001e683820] [c00000000023cb80] pcpu_alloc+0x300/0x770 [ 1.957881] [c00000001e683920] [c00000000028ee5c] kmem_cache_open+0x40c/0x550 [ 1.957929] [c00000001e6839f0] [c00000000028f7f4] __kmem_cache_create+0x54/0x2c0 [ 1.957986] [c00000001e683aa0] [c0000000002400d4] do_kmem_cache_create+0xa4/0x230 [ 1.958043] [c00000001e683b10] [c0000000002403b0] kmem_cache_create+0x150/0x270 [ 1.958099] [c00000001e683bd0] [c000000000def0e0] dm_kcopyd_init+0x30/0x90 [ 1.958148] [c00000001e683bf0] [c000000000deecc8] dm_init+0x4c/0xbc [ 1.958197] [c00000001e683c30] [c00000000000b4dc] do_one_initcall+0x12c/0x280 [ 1.958246] [c00000001e683d00] [c000000000d94174] kernel_init_freeable+0x25c/0x33c [ 1.958302] [c00000001e683dc0] [c00000000000be0c] kernel_init+0x2c/0x140 [ 1.958351] [c00000001e683e30] [c000000000009568] ret_from_kernel_thread+0x5c/0x74 [ 1.958407] handlers: [ 1.958425] [<c00000000077dcc0>] usb_hcd_irq [ 1.958458] Disabling IRQ #18 ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.18.0-13-generic 3.18.0-13.14 ProcVersionSignature: Ubuntu 3.18.0-13.14-generic 3.18.5 Uname: Linux 3.18.0-13-generic ppc64le AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.16-0ubuntu1 Architecture: ppc64el ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' CRDA: Error: [Errno 2] No such file or directory: 'iw' CurrentDmesg: [ 44.146711] systemd-logind[1324]: Failed to start user service: Unknown unit: user@1000.service [ 44.151708] systemd-logind[1324]: New session 1 of user ubuntu. [ 57.920335] systemd-logind[1324]: Removed session 1. [ 79.421120] systemd-logind[1324]: New session 2 of user ubuntu. [ 704.822922] systemd-logind[1324]: New session 4 of user ubuntu. Date: Thu Feb 12 20:26:17 2015 Ec2AMI: ami-00000001 Ec2AMIManifest: FIXME Ec2AvailabilityZone: nova Ec2InstanceType: m1.small Ec2Kernel: None Ec2Ramdisk: None IwConfig: eth0 no wireless extensions. lo no wireless extensions. Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub PciMultimedia: ProcEnviron: TERM=screen PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinux-3.18.0-13-generic root=UUID=6ceeb15f-a85a-46d3-aba0-64598781f826 ro console=hvc0 earlyprintk ProcLoadAvg: 0.08 0.03 0.04 1/82 11730 ProcLocks: 1: POSIX ADVISORY WRITE 1057 00:0f:9711 0 EOF 2: FLOCK ADVISORY WRITE 1040 00:0f:9709 0 EOF ProcModules: dm_crypt 27146 0 - Live 0xd000000002030000 ProcSwaps: Filename Type Size Used Priority ProcVersion: Linux version 3.18.0-13-generic (buildd@fisher04) (gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu5) ) #14-Ubuntu SMP Fri Feb 6 09:57:41 UTC 2015 RelatedPackageVersions: linux-restricted-modules-3.18.0-13-generic N/A linux-backports-modules-3.18.0-13-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) cpu_cores: Number of cores present = 1 cpu_coreson: Number of cores online = 1 cpu_dscr: DSCR is 0 cpu_freq: min: 3.642 GHz (cpu 0) max: 3.642 GHz (cpu 0) avg: 3.642 GHz cpu_runmode: run-mode=0 cpu_smt: Error: command ['ppc64_cpu', '--smt'] failed with exit code 255: Machine is not SMT capable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1421400/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
