Dear KVM experts, We have a Broadwell server reboot itself recently, before the reboot, there were error messages from KVM in netconsole: [5599380.317055] kvm [9046]: vcpu1, guest rIP: 0xffffffff816ad716 vmx: unexpected exit reason 0x3 [5599380.317060] kvm [49626]: vcpu0, guest rIP: 0xffffffff81060fe6 vmx: unexpected exit reason 0x3 [5599380.317062] kvm [36632]: vcpu0, guest rIP: 0xffffffff8103970d vmx: unexpected exit reason 0x3 [5599380.317064] kvm [9620]: vcpu1, guest rIP: 0xffffffffb6c1b08e vmx: unexpected exit reason 0x3 [5599380.317067] kvm [49925]: vcpu5, guest rIP: 0xffffffff9b406ea2 vmx: unexpected exit reason 0x3 [5599380.317068] kvm [49925]: vcpu3, guest rIP: 0xffffffff9b406ea2 vmx: unexpected exit reason 0x3 [5599380.317070] kvm [33871]: vcpu2, guest rIP: 0xffffffff81060fe6 vmx: unexpected exit reason 0x3 [5599380.317072] kvm [49925]: vcpu4, guest rIP: 0xffffffff9b406ea2 vmx: unexpected exit reason 0x3 [5599380.317074] kvm [48505]: vcpu1, guest rIP: 0xffffffffaf36bf9b vmx: unexpected exit reason 0x3 [5599380.317076] kvm [21880]: vcpu1, guest rIP: 0xffffffff8103970d vmx: unexpected exit reason 0x3 Kernel version is: 4.14.129 CPU is Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz There is no crashdump generated, only above message right before server reboot. Anyone has an idea, what could cause the reboot? is there a known problem in this regards? I notice EXIT_REASON_INIT_SIGNAL(3) is introduced recently, is it related? https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/x86/kvm?id=4b9852f4f38909a9ca74e71afb35aafba0871aa1 Regards, Jinpu
