Hi all, I have Leap 42.1 installed on a set of servers that are used for hosting KVM virtual machines. Since 12 June, one of those servers started to reboot unexpectedly every 2-4 hours. Until then it had no uptime issues. Initially I thought this was a hardware failure, so I started looking for disk, memory errors etc. No problems found. Then I realized that this machine was the last one patched with updates... so I re-installed Leap from scratch. Result: The server works as expected again. Then I did the following test: I updated another server. Result: this server started rebooting.... I am afraid there is something broken in libvirt or in the recent kernel updates. This is part of the crash log I get: │kernel │NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [qemu-system-│ │kernel │Modules linked in: vhost_net vhost macvtap macvlan tun ebtable_filt│ │kernel │ nfs_acl lockd grace crct10dif_pclmul crc32_pclmul aesni_intel aes_│ │kernel │CPU: 1 PID: 3653 Comm: qemu-system-x86 Not tainted 4.1.21-14-defaul│ │kernel │Hardware name: MSI MS-7885/X99S SLI PLUS (MS-7885), BIOS 1.40 11/05│ │kernel │task: ffff88088e0c65d0 ti: ffff880899508000 task.ti: ffff8808995080│ │kernel │RIP: 0010:[<ffffffff810e82f6>] [<ffffffff810e82f6>] smp_call_funct│ │kernel │RSP: 0018:ffff88089950bc08 EFLAGS: 00000202 │ │kernel │RAX: 0000000000000000 RBX: 0000000000000296 RCX: 0000000000000001 │ │kernel │RDX: 0000000000000003 RSI: 0000000000000200 RDI: 0000000000000296 │ │kernel │RBP: ffffffffa0df8430 R08: 0000000000000007 R09: 0000000000000000 │ │kernel │R10: 0000000000000004 R11: 0000000000000005 R12: 0000000000000838 │ │kernel │R13: 0000000000000296 R14: ffffffff810d4953 R15: 0000000000000286 │ │kernel │FS: 00007f0164db0700(0000) GS:ffff88089f240000(0000) knlGS:0000000│ │kernel │CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 │ │kernel │CR2: 00007ffccc21e578 CR3: 00000008998a4000 CR4: 00000000001426e0 │ │kernel │Stack: │ │kernel │ 0000000200000000 ffff8808971b9400 0000000000000000 ffffffffa0df843│ │kernel │ ffff8808881dbbb0 0000000000000003 0000000000000000 ffff8808881d808│ │kernel │ 0000000000000001 ffffffffa0dfa4f5 ffff88089f216770 000000000000000│ │kernel │Call Trace: │ │kernel │ [<ffffffffa0dfa4f5>] vmx_vcpu_load+0x175/0x190 [kvm_intel] │ │kernel │ [<ffffffffa06964e0>] kvm_arch_vcpu_load+0x30/0x1b0 [kvm] │ │kernel │ [<ffffffff8108c538>] finish_task_switch+0x88/0x100 │ │kernel │ [<ffffffff81661381>] thread_return+0x38/0x657 │ │kernel │ [<ffffffff816619d7>] schedule+0x37/0x90 │ │kernel │ [<ffffffffa0680f13>] kvm_vcpu_block+0x73/0x190 [kvm] │ │kernel │ [<ffffffffa069c676>] kvm_arch_vcpu_ioctl_run+0xe6/0x430 [kvm] │ │kernel │ [<ffffffffa0685429>] kvm_vcpu_ioctl+0x329/0x620 [kvm] │ │kernel │ [<ffffffff811f235f>] do_vfs_ioctl+0x2ff/0x510 │ │kernel │ [<ffffffff811f25f1>] SyS_ioctl+0x81/0xa0 │ │kernel │ [<ffffffff816658f2>] system_call_fastpath+0x16/0x75 │ │kernel │ [<00007f0179730b87>] 0x7f0179730b87 │ │kernel │Code: 0f 1f 44 00 00 48 8d 74 24 10 48 89 d1 89 df 48 89 ea e8 4e f┬ │kernel │Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 0 Any ideas? Thanks, Angelos -- Angelos Tzotsos, PhD OSGeo Charter Member http://users.ntua.gr/tzotsos -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org