Linux version 3.12.0-rc4-00014-gda2b6fb #1
Command line: hung_task_panic=1 earlyprintk=ttyS0,115200 debug apic=debug sysrq_always_enabled panic=10  prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal  root=/dev/ram0 rw link=/kernel-tests/run-queue/kvm/x86_64-randconfig-s1-01101738/tip:x86:kaslr/.vmlinuz-da2b6fb990cf782b18952f534ec7323453bc4fc9-20140116085414-80-nhm4 branch=tip/x86/kaslr BOOT_IMAGE=/kernel/x86_64-randconfig-s1-01101738/da2b6fb990cf782b18952f534ec7323453bc4fc9/vmlinuz-3.12.0-rc4-00014-gda2b6fb

early console in setup code
Probing EDD (edd=off to disable)... ok
early console in decompress_kernel
KASLR using RDTSC...

Decompressing Linux... Parsing ELF... Performing relocations... done.
Booting the kernel.

BUG: kernel boot hang
Elapsed time: 610
qemu-system-x86_64 -cpu kvm64 -enable-kvm -kernel /kernel/x86_64-randconfig-s1-01101738/da2b6fb990cf782b18952f534ec7323453bc4fc9/vmlinuz-3.12.0-rc4-00014-gda2b6fb -append 'hung_task_panic=1 earlyprintk=ttyS0,115200 debug apic=debug sysrq_always_enabled panic=10  prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal  root=/dev/ram0 rw link=/kernel-tests/run-queue/kvm/x86_64-randconfig-s1-01101738/tip:x86:kaslr/.vmlinuz-da2b6fb990cf782b18952f534ec7323453bc4fc9-20140116085414-80-nhm4 branch=tip/x86/kaslr BOOT_IMAGE=/kernel/x86_64-randconfig-s1-01101738/da2b6fb990cf782b18952f534ec7323453bc4fc9/vmlinuz-3.12.0-rc4-00014-gda2b6fb'  -initrd /kernel-tests/initrd/yocto-minimal-x86_64.cgz -m 256M -smp 2 -net nic,vlan=1,model=e1000 -net user,vlan=1,hostfwd=tcp::9336-:22 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -soundhw hda -drive file=/fs/LABEL=KVM/disk0-yocto-nhm4-4,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk1-yocto-nhm4-4,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk2-yocto-nhm4-4,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk3-yocto-nhm4-4,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk4-yocto-nhm4-4,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk5-yocto-nhm4-4,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-yocto-nhm4-4 -serial file:/dev/shm/kboot/serial-yocto-nhm4-4 -daemonize -display none -monitor null