BUG: kernel early crashed 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-x19-0606/staging:staging-next/.vmlinuz-f2c3d800972670fb49bc0ebaeb02450aa591eb0a-20130606164838-7-xian branch=staging/staging-next  BOOT_IMAGE=/kernel/i386-randconfig-x19-0606/f2c3d800972670fb49bc0ebaeb02450aa591eb0a/vmlinuz-3.10.0-rc3-00579-gf2c3d80
Early crashed kernel: vmlinuz-3.10.0-rc3-00579-gf2c3d80 3.10.0-rc3-00579-gf2c3d80 #5