Looking through the journal further, I do see non-NVidia call traces such as:
Nov 27 09:43:52 surprise kernel: INFO: task qemu-system-x86:16736 blocked for more than 120 seconds. Nov 27 09:43:52 surprise kernel: Tainted: P OEL 5.8.0-29-generic #31-Ubuntu Nov 27 09:43:52 surprise kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 27 09:43:52 surprise kernel: qemu-system-x86 D 0 16736 1 0x00000320 Nov 27 09:43:52 surprise kernel: Call Trace: Nov 27 09:43:52 surprise kernel: __schedule+0x212/0x5d0 Nov 27 09:43:52 surprise kernel: ? usleep_range+0x90/0x90 Nov 27 09:43:52 surprise kernel: schedule+0x55/0xc0 Nov 27 09:43:52 surprise kernel: schedule_timeout+0x10f/0x160 Nov 27 09:43:52 surprise kernel: ? do_sync_core+0x1d/0x20 Nov 27 09:43:52 surprise kernel: __wait_for_common+0xa8/0x150 Nov 27 09:43:52 surprise kernel: wait_for_completion+0x24/0x30 Nov 27 09:43:52 surprise kernel: __wait_rcu_gp+0x11b/0x120 Nov 27 09:43:52 surprise kernel: synchronize_rcu+0x67/0x70 Nov 27 09:43:52 surprise kernel: ? __call_rcu+0x250/0x250 Nov 27 09:43:52 surprise kernel: ? __bpf_trace_rcu_utilization+0x10/0x10 Nov 27 09:43:52 surprise kernel: account_event+0x1e8/0x1f0 Nov 27 09:43:52 surprise kernel: perf_event_alloc+0x77e/0x920 Nov 27 09:43:52 surprise kernel: ? kvm_perf_overflow+0x40/0x40 [kvm] Nov 27 09:43:52 surprise kernel: perf_event_create_kernel_counter.part.0+0x21/0x160 Nov 27 09:43:52 surprise kernel: perf_event_create_kernel_counter+0xf/0x20 Nov 27 09:43:52 surprise kernel: pmc_reprogram_counter+0x105/0x190 [kvm] Nov 27 09:43:52 surprise kernel: reprogram_gp_counter+0x194/0x210 [kvm] Nov 27 09:43:52 surprise kernel: amd_pmu_set_msr+0x17d/0x190 [kvm_amd] Nov 27 09:43:52 surprise kernel: kvm_pmu_set_msr+0x4e/0x60 [kvm] Nov 27 09:43:52 surprise kernel: kvm_set_msr_common+0x4cc/0xf00 [kvm] Nov 27 09:43:52 surprise kernel: svm_set_msr+0x39d/0x6e0 [kvm_amd] Nov 27 09:43:52 surprise kernel: __kvm_set_msr+0x8a/0x150 [kvm] Nov 27 09:43:52 surprise kernel: kvm_emulate_wrmsr+0x3c/0x120 [kvm] Nov 27 09:43:52 surprise kernel: handle_exit+0x39a/0x420 [kvm_amd] Nov 27 09:43:52 surprise kernel: ? kvm_set_cr8+0x22/0x40 [kvm] Nov 27 09:43:52 surprise kernel: vcpu_enter_guest+0x862/0xd90 [kvm] Nov 27 09:43:52 surprise kernel: ? kvm_apic_has_interrupt+0x41/0x80 [kvm] Nov 27 09:43:52 surprise kernel: ? kvm_cpu_has_interrupt+0x7a/0x90 [kvm] Nov 27 09:43:52 surprise kernel: ? kvm_vcpu_has_events+0x134/0x190 [kvm] Nov 27 09:43:52 surprise kernel: vcpu_run+0x76/0x240 [kvm] Nov 27 09:43:52 surprise kernel: kvm_arch_vcpu_ioctl_run+0x9f/0x2b0 [kvm] Nov 27 09:43:52 surprise kernel: kvm_vcpu_ioctl+0x247/0x600 [kvm] Nov 27 09:43:52 surprise kernel: ksys_ioctl+0x8e/0xc0 Nov 27 09:43:52 surprise kernel: __x64_sys_ioctl+0x1a/0x20 Nov 27 09:43:52 surprise kernel: do_syscall_64+0x49/0xc0 Nov 27 09:43:52 surprise kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 Nov 27 09:43:52 surprise kernel: RIP: 0033:0x7fc2853b16d7 Nov 27 09:43:52 surprise kernel: Code: Bad RIP value. Nov 27 09:43:52 surprise kernel: RSP: 002b:00007fc276220068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 Nov 27 09:43:52 surprise kernel: RAX: ffffffffffffffda RBX: 000000000000ae80 RCX: 00007fc2853b16d7 Nov 27 09:43:52 surprise kernel: RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000023 Nov 27 09:43:52 surprise kernel: RBP: 0000000000000000 R08: 0000564557831eb0 R09: 00000000ffffffe1 Nov 27 09:43:52 surprise kernel: R10: 0000000000000001 R11: 0000000000000246 R12: 0000564557ba8ad0 Nov 27 09:43:52 surprise kernel: R13: 0000564556b5c040 R14: 00007fc289010000 R15: 0000000000000000
Looking through the journal further, I do see non-NVidia call traces such as:
Nov 27 09:43:52 surprise kernel: INFO: task qemu-system- x86:16736 blocked for more than 120 seconds. kernel/ hung_task_ timeout_ secs" disables this message. 0x212/0x5d0 range+0x90/ 0x90 timeout+ 0x10f/0x160 core+0x1d/ 0x20 for_common+ 0xa8/0x150 completion+ 0x24/0x30 rcu_gp+ 0x11b/0x120 rcu+0x67/ 0x70 rcu+0x250/ 0x250 rcu_utilization +0x10/0x10 event+0x1e8/ 0x1f0 alloc+0x77e/ 0x920 overflow+ 0x40/0x40 [kvm] create_ kernel_ counter. part.0+ 0x21/0x160 create_ kernel_ counter+ 0xf/0x20 counter+ 0x105/0x190 [kvm] gp_counter+ 0x194/0x210 [kvm] set_msr+ 0x17d/0x190 [kvm_amd] set_msr+ 0x4e/0x60 [kvm] msr_common+ 0x4cc/0xf00 [kvm] msr+0x39d/ 0x6e0 [kvm_amd] msr+0x8a/ 0x150 [kvm] wrmsr+0x3c/ 0x120 [kvm] exit+0x39a/ 0x420 [kvm_amd] cr8+0x22/ 0x40 [kvm] guest+0x862/ 0xd90 [kvm] has_interrupt+ 0x41/0x80 [kvm] has_interrupt+ 0x7a/0x90 [kvm] has_events+ 0x134/0x190 [kvm] vcpu_ioctl_ run+0x9f/ 0x2b0 [kvm] ioctl+0x247/ 0x600 [kvm] 0x8e/0xc0 ioctl+0x1a/ 0x20 64+0x49/ 0xc0 64_after_ hwframe+ 0x44/0xa9 220068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Nov 27 09:43:52 surprise kernel: Tainted: P OEL 5.8.0-29-generic #31-Ubuntu
Nov 27 09:43:52 surprise kernel: "echo 0 > /proc/sys/
Nov 27 09:43:52 surprise kernel: qemu-system-x86 D 0 16736 1 0x00000320
Nov 27 09:43:52 surprise kernel: Call Trace:
Nov 27 09:43:52 surprise kernel: __schedule+
Nov 27 09:43:52 surprise kernel: ? usleep_
Nov 27 09:43:52 surprise kernel: schedule+0x55/0xc0
Nov 27 09:43:52 surprise kernel: schedule_
Nov 27 09:43:52 surprise kernel: ? do_sync_
Nov 27 09:43:52 surprise kernel: __wait_
Nov 27 09:43:52 surprise kernel: wait_for_
Nov 27 09:43:52 surprise kernel: __wait_
Nov 27 09:43:52 surprise kernel: synchronize_
Nov 27 09:43:52 surprise kernel: ? __call_
Nov 27 09:43:52 surprise kernel: ? __bpf_trace_
Nov 27 09:43:52 surprise kernel: account_
Nov 27 09:43:52 surprise kernel: perf_event_
Nov 27 09:43:52 surprise kernel: ? kvm_perf_
Nov 27 09:43:52 surprise kernel: perf_event_
Nov 27 09:43:52 surprise kernel: perf_event_
Nov 27 09:43:52 surprise kernel: pmc_reprogram_
Nov 27 09:43:52 surprise kernel: reprogram_
Nov 27 09:43:52 surprise kernel: amd_pmu_
Nov 27 09:43:52 surprise kernel: kvm_pmu_
Nov 27 09:43:52 surprise kernel: kvm_set_
Nov 27 09:43:52 surprise kernel: svm_set_
Nov 27 09:43:52 surprise kernel: __kvm_set_
Nov 27 09:43:52 surprise kernel: kvm_emulate_
Nov 27 09:43:52 surprise kernel: handle_
Nov 27 09:43:52 surprise kernel: ? kvm_set_
Nov 27 09:43:52 surprise kernel: vcpu_enter_
Nov 27 09:43:52 surprise kernel: ? kvm_apic_
Nov 27 09:43:52 surprise kernel: ? kvm_cpu_
Nov 27 09:43:52 surprise kernel: ? kvm_vcpu_
Nov 27 09:43:52 surprise kernel: vcpu_run+0x76/0x240 [kvm]
Nov 27 09:43:52 surprise kernel: kvm_arch_
Nov 27 09:43:52 surprise kernel: kvm_vcpu_
Nov 27 09:43:52 surprise kernel: ksys_ioctl+
Nov 27 09:43:52 surprise kernel: __x64_sys_
Nov 27 09:43:52 surprise kernel: do_syscall_
Nov 27 09:43:52 surprise kernel: entry_SYSCALL_
Nov 27 09:43:52 surprise kernel: RIP: 0033:0x7fc2853b16d7
Nov 27 09:43:52 surprise kernel: Code: Bad RIP value.
Nov 27 09:43:52 surprise kernel: RSP: 002b:00007fc276
Nov 27 09:43:52 surprise kernel: RAX: ffffffffffffffda RBX: 000000000000ae80 RCX: 00007fc2853b16d7
Nov 27 09:43:52 surprise kernel: RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000023
Nov 27 09:43:52 surprise kernel: RBP: 0000000000000000 R08: 0000564557831eb0 R09: 00000000ffffffe1
Nov 27 09:43:52 surprise kernel: R10: 0000000000000001 R11: 0000000000000246 R12: 0000564557ba8ad0
Nov 27 09:43:52 surprise kernel: R13: 0000564556b5c040 R14: 00007fc289010000 R15: 0000000000000000