BUG: kernel early hang without any printk output
Command line: hung_task_panic=1 rcutree.rcu_cpu_stall_timeout=100 log_buf_len=8M ignore_loglevel debug sched_debug apic=debug dynamic_printk 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/i386-randconfig-i005-1008/kees:kaslr-c-v6/.vmlinuz-544c3c7c7c7a22deabefbdd4b42675924bcc7afa-20131008114452-8-inn branch=kees/kaslr-c-v6 BOOT_IMAGE=/kernel/i386-randconfig-i005-1008/544c3c7c7c7a22deabefbdd4b42675924bcc7afa/vmlinuz-3.12.0-rc4-00027-g544c3c7
Early hang kernel: vmlinuz-3.12.0-rc4-00027-g544c3c7 3.12.0-rc4-00027-g544c3c7 #351
Elapsed time: 35
qemu-system-x86_64 -cpu kvm64 -enable-kvm -kernel /kernel/i386-randconfig-i005-1008/544c3c7c7c7a22deabefbdd4b42675924bcc7afa/vmlinuz-3.12.0-rc4-00027-g544c3c7 -append 'hung_task_panic=1 rcutree.rcu_cpu_stall_timeout=100 log_buf_len=8M ignore_loglevel debug sched_debug apic=debug dynamic_printk 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/i386-randconfig-i005-1008/kees:kaslr-c-v6/.vmlinuz-544c3c7c7c7a22deabefbdd4b42675924bcc7afa-20131008114452-8-inn branch=kees/kaslr-c-v6 BOOT_IMAGE=/kernel/i386-randconfig-i005-1008/544c3c7c7c7a22deabefbdd4b42675924bcc7afa/vmlinuz-3.12.0-rc4-00027-g544c3c7'  -initrd /kernel-tests/initrd/yocto-minimal-i386.cgz -m 256M -smp 2 -net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio -net user,vlan=0,hostfwd=tcp::38431-:22 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -drive file=/fs/LABEL=KVM/disk0-yocto-inn-2,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk1-yocto-inn-2,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk2-yocto-inn-2,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk3-yocto-inn-2,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk4-yocto-inn-2,media=disk,if=virtio -drive file=/fs/LABEL=KVM/disk5-yocto-inn-2,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-yocto-inn-2 -serial file:/dev/shm/kboot/serial-yocto-inn-2 -daemonize -display none -monitor null