Does anyone know of a reason that would cause qemu-kvm to segfault when the system is running the an PAE kernel? Qemu-kvm works fine if I am using the kernel.i686 package. When it does crash under the PAE kernel it leaves this message in dmesg: kvm: 3646: cpu0 unhandled rdmsr: 0xc0000080 kvm: inject_page_fault: double fault 0x804d6ffc kvm: 3646: cpu0 task_switch_interception: task switch is unsupported Selinux is currently set to permissive so I know it is not selinux's fault. I am currently running the 2.6.25.4-30.fc9.i686.PAE kernel. root@tinybox winxp_qemu # qemu-kvm winxp_qemu.img unhandled vm exit: 0x3f60101 vcpu_id 0 rax 000000002446ff20 rbx 000000008054269c rcx 0000000000000000 rdx 0000000000008052 rsi 00000000805426c8 rdi 0000000000000000 rsp 00000000804d7000 rbp 000000008052d44d r8 0000000000000000 r9 0000000000000000 r10 0000000000000000 r11 0000000000000000 r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 0000000000000000 rip 0000000080540470 rflags 00000086 cs 0008 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type b l 0 g 0 avl 0) ds 0023 (00000000/ffffffff p 1 dpl 3 db 1 s 1 type 3 l 0 g 1 avl 0) es 0023 (00000000/ffffffff p 1 dpl 3 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 0030 (ffdff000/00001fff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0) gs 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 1 type 3 l 0 g 0 avl 0) tr 0028 (80042000/000020ab p 1 dpl 0 db 0 s 0 type 9 l 0 g 0 avl 0) ldt 0000 (00000000/0000ffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0) gdt 8003f000/3ff idt 8003f400/7ff cr0 8001003d cr2 804d6ffc cr3 abc000 cr4 20 cr8 0 efer 0 Aborted My cpu is a AMD Athlon(tm) X2 Dual Core Processor BE-2400 flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch ts fid vid ttp tm stc 100mhzsteps