------- Comment on attachment From [email protected] 2017-04-07 05:36 EDT-------
Am able to hit the issue with 4.10.0-18-generic #uname -a Linux xxx 4.10.0-18-generic #20-Ubuntu SMP Wed Apr 5 17:17:06 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux System becomes non-responsive, tried sosreport it could not and hit traces, # sosreport [45667.573198] INFO: rcu_sched self-detected stall on CPU [45667.573273] 40-...: (5708015 ticks this GP) idle=fb9/140000000000001/0 softirq=427145/427152 fqs=2849867 [45667.573287] (t=5708055 jiffies g=269170 c=269169 q=847028) [45667.573355] Task dump for CPU 32: [45667.573393] numad R running task 0 2709 1 0x00042004 [45667.573467] Call Trace: [45667.573494] [c000000002e17560] [c0000007edf388b8] 0xc0000007edf388b8 (unreliable) [45667.573569] Task dump for CPU 40: [45667.573607] CPU 0/KVM R running task 0 44171 1 0x00042004 [45667.573681] Call Trace: [45667.573709] [c0000007e9ce2fc0] [c00000000011eb1c] sched_show_task+0xcc/0x150 (unreliable) [45667.573784] [c0000007e9ce3030] [c000000000b5b798] rcu_dump_cpu_stacks+0xec/0x120 [45667.573859] [c0000007e9ce3080] [c00000000016d5b0] rcu_check_callbacks+0x930/0xb30 [45667.573935] [c0000007e9ce31b0] [c000000000176dd8] update_process_times+0x48/0x90 [45667.574010] [c0000007e9ce31e0] [c00000000018e2d0] tick_sched_handle.isra.7+0x30/0xb0 [45667.574085] [c0000007e9ce3210] [c00000000018e3b4] tick_sched_timer+0x64/0xd0 [45667.574160] [c0000007e9ce3250] [c0000000001779e4] __hrtimer_run_queues+0x124/0x420 [45667.574234] [c0000007e9ce32e0] [c000000000178918] hrtimer_interrupt+0xf8/0x330 [45667.574310] [c0000007e9ce33b0] [c000000000023e8c] __timer_interrupt+0x8c/0x270 [45667.574386] [c0000007e9ce3400] [c00000000002428c] timer_interrupt+0x9c/0xe0 [45667.574449] [c0000007e9ce3430] [c0000000000090a4] decrementer_common+0x114/0x120 [45667.574526] --- interrupt: 901 at _raw_spin_lock+0x74/0xe0 [45667.574526] LR = follow_page_pte+0x120/0x830 [45667.574625] [c0000007e9ce3720] [8010018000000000] 0x8010018000000000 (unreliable) [45667.574701] [c0000007e9ce3750] [c0000000002b4250] follow_page_pte+0x120/0x830 [45667.574776] [c0000007e9ce37e0] [c0000000002b54fc] __get_user_pages+0x10c/0x4e0 [45667.574851] [c0000007e9ce3890] [c0000000002b5c64] get_user_pages_unlocked+0xf4/0x280 [45667.574927] [c0000007e9ce3930] [c0000000002b6e2c] get_user_pages_fast+0xac/0x100 [45667.575004] [c0000007e9ce3980] [d00000000f62d074] kvmppc_book3s_hv_page_fault+0x2bc/0xbc0 [kvm_hv] [45667.575093] [c0000007e9ce3a70] [d00000000f629a30] kvmppc_vcpu_run_hv+0xbc8/0x1220 [kvm_hv] [45667.575174] [c0000007e9ce3b80] [d00000000f5932bc] kvmppc_vcpu_run+0x34/0x48 [kvm] [45667.575254] [c0000007e9ce3ba0] [d00000000f59036c] kvm_arch_vcpu_ioctl_run+0x64/0x170 [kvm] [45667.575333] [c0000007e9ce3be0] [d00000000f583db8] kvm_vcpu_ioctl+0x500/0x780 [kvm] [45667.575409] [c0000007e9ce3d40] [c00000000035c674] do_vfs_ioctl+0xd4/0x8c0 [45667.575473] [c0000007e9ce3de0] [c00000000035cf34] SyS_ioctl+0xd4/0xf0 [45667.575537] [c0000007e9ce3e30] [c00000000000b184] system_call+0x38/0xe0 [45667.575599] Task dump for CPU 48: [45667.575636] CPU 28/KVM R running task 0 44199 1 0x00042004 [45667.575711] Call Trace: [45667.575737] [c0000007e9cab720] [c0000007e9cab900] 0xc0000007e9cab900 (unreliable) [45667.575813] [c0000007e9cab750] [c0000000002b4250] follow_page_pte+0x120/0x830 [45667.575888] [c0000007e9cab7e0] [c0000000002b54fc] __get_user_pages+0x10c/0x4e0 [45667.575964] [c0000007e9cab890] [c0000000002b5c64] get_user_pages_unlocked+0xf4/0x280 [45667.576039] [c0000007e9cab930] [c0000000002b6e2c] get_user_pages_fast+0xac/0x100 [45667.576116] [c0000007e9cab980] [d00000000f62d074] kvmppc_book3s_hv_page_fault+0x2bc/0xbc0 [kvm_hv] [45667.576205] [c0000007e9caba70] [d00000000f629a30] kvmppc_vcpu_run_hv+0xbc8/0x1220 [kvm_hv] [45667.576287] [c0000007e9cabb80] [d00000000f5932bc] kvmppc_vcpu_run+0x34/0x48 [kvm] [45667.576368] [c0000007e9cabba0] [d00000000f59036c] kvm_arch_vcpu_ioctl_run+0x64/0x170 [kvm] [45667.576448] [c0000007e9cabbe0] [d00000000f583db8] kvm_vcpu_ioctl+0x500/0x780 [kvm] [45667.576524] [c0000007e9cabd40] [c00000000035c674] do_vfs_ioctl+0xd4/0x8c0 [45667.576628] [c0000007e9cabde0] [c00000000035cf34] SyS_ioctl+0xd4/0xf0 [45667.576743] [c0000007e9cabe30] [c00000000000b184] system_call+0x38/0xe0 ** Attachment added: "dmesg" https://bugs.launchpad.net/bugs/1680390/+attachment/4857151/+files/ubuntu1704-dmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1680390 Title: Ubuntu17.04: Kernel Oops: Exception in kernel mode, sig: 5 [#1] during Avocado KVM Test runs [Regression] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1680390/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
