kernel: 0.968 graphic: 0.959 device: 0.932 architecture: 0.838 PID: 0.660 semantic: 0.644 debug: 0.599 x86: 0.570 register: 0.535 boot: 0.502 vnc: 0.440 performance: 0.407 ppc: 0.403 permissions: 0.393 i386: 0.361 hypervisor: 0.345 socket: 0.325 user-level: 0.313 risc-v: 0.307 TCG: 0.284 mistranslation: 0.270 network: 0.263 VMM: 0.229 virtual: 0.226 arm: 0.200 files: 0.171 peripherals: 0.133 assembly: 0.052 KVM: 0.025 Qemu triggers the split lock detection of the Linux kernel Description of problem: Windows displays a "blue screen of death" and the Linux kernel logs this error message: ``` [ 180.886150] x86/split lock detection: #AC: qemu-system-x86/10167 took a split_lock trap at address: 0x3ff2624d [ 180.946151] x86/split lock detection: #AC: qemu-system-x86/10168 took a split_lock trap at address: 0x3ff2624d ``` Steps to reproduce: 1. Start the guest OS 2. Do some stuff in the Windows guest (for instance OS updates) Additional information: Is this a bug in Windows or in Qemu ?