Avi, with 2c8232f over kvm-kmod and "qemu-system-x86_64 -m 256 vm-image.qcow2 -snapshot -serial stdio -s -smp 2" I just got this: KVM internal error. Suberror: 1 rax 0000000000000000 rbx 0000000000006f08 rcx 0000000000000000 rdx 0000000000000052 rsi 0000000000000000 rdi 00000000000f4fd4 rsp 0000000000006ed8 rbp 00000000000f7280 r8 0000000000000000 r9 0000000000000000 r10 0000000000000000 r11 0000000000000000 r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 0000000000000000 rip 00000000f000ff53 rflags 00010016 cs 0008 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type b l 0 g 1 avl 0) ds 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0) es 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0) ss 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0) fs 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0) gs 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0) tr 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0) ldt 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type 2 l 0 g 0 avl 0) gdt f7a20/37 idt f8aa0/0 cr0 11 cr2 0 cr3 0 cr4 0 cr8 0 efer 0 emulation failure Before that run, I started the very same VM and shut it down via system_powerdown. This is reproducible! Maybe it's the same issue that causes the #UD regression with -no-kvm-irqchip. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html