Linux version 4.0.0-rc4-next-20150319 #79
Command line: user=lkp job=/lkp/scheduled/vm-kbuild-yocto-x86_64-29/rand_boot-1-yocto-minimal-x86_64.cgz-x86_64-randconfig-iv0-03191805-ce040cc379e3e1e094db5559f393d794fbfd01e4-1-20150319-57492-1xfdchl.yaml ARCH=x86_64 BOOT_IMAGE=/kernel/x86_64-randconfig-iv0-03191805/ce040cc379e3e1e094db5559f393d794fbfd01e4/vmlinuz-4.0.0-rc4-next-20150319 kconfig=x86_64-randconfig-iv0-03191805 commit=ce040cc379e3e1e094db5559f393d794fbfd01e4 branch=next/master root=/dev/ram0 max_uptime=3600 RESULT_ROOT=/result/vm-kbuild-yocto-x86_64/boot/1/yocto-minimal-x86_64.cgz/x86_64-randconfig-iv0-03191805/ce040cc379e3e1e094db5559f393d794fbfd01e4/0 ip=::::vm-kbuild-yocto-x86_64-29::dhcp earlyprintk=ttyS0,115200 rd.udev.log-priority=err systemd.log_target=journal systemd.log_level=warning debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw drbd.minor_count=8

early console in setup code
early console in decompress_kernel

Decompressing Linux... 

Decoding failed

 -- System halted
BUG: kernel boot hang
Elapsed time: 305
qemu-system-x86_64 -enable-kvm -cpu SandyBridge -kernel /kernel/x86_64-randconfig-iv0-03191805/ce040cc379e3e1e094db5559f393d794fbfd01e4/vmlinuz-4.0.0-rc4-next-20150319 -append 'user=lkp job=/lkp/scheduled/vm-kbuild-yocto-x86_64-29/rand_boot-1-yocto-minimal-x86_64.cgz-x86_64-randconfig-iv0-03191805-ce040cc379e3e1e094db5559f393d794fbfd01e4-1-20150319-57492-1xfdchl.yaml ARCH=x86_64 BOOT_IMAGE=/kernel/x86_64-randconfig-iv0-03191805/ce040cc379e3e1e094db5559f393d794fbfd01e4/vmlinuz-4.0.0-rc4-next-20150319 kconfig=x86_64-randconfig-iv0-03191805 commit=ce040cc379e3e1e094db5559f393d794fbfd01e4 branch=next/master root=/dev/ram0 max_uptime=3600 RESULT_ROOT=/result/vm-kbuild-yocto-x86_64/boot/1/yocto-minimal-x86_64.cgz/x86_64-randconfig-iv0-03191805/ce040cc379e3e1e094db5559f393d794fbfd01e4/0 ip=::::vm-kbuild-yocto-x86_64-29::dhcp earlyprintk=ttyS0,115200 rd.udev.log-priority=err systemd.log_target=journal systemd.log_level=warning debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw drbd.minor_count=8'  -initrd /fs/sdd1/initrd-vm-kbuild-yocto-x86_64-29 -m 320 -smp 1 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdd1/disk0-vm-kbuild-yocto-x86_64-29,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-x86_64-29 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-x86_64-29 -daemonize -display none -monitor null