linux：在qemu中运行自编译内核：VFS：无法在未知的wn-block(0,0)上挂载root fs

    qemu-system-x86_64 -m 1024M -kernel /path/to/bzImage -hda /var/lib/libvirt/images/Debian.img -append "root=/dev/sda1 console=ttyS0" -enable-kvm -nographic

    [    0.195285] Initializing network drop monitor service
    [    0.196177] List of all partitions:
    [    0.196641] No filesystem Could mount root,tried: 
    [    0.197292] Kernel panic - not syncing: VFS: Unable to mount root fs on unkNown-block(0,0)
    [    0.198355] Pid: 1,comm: swapper/0 Not tainted 3.2.46 #7
    [    0.199055] Call Trace:
    [    0.199386]  [@H_616_37@

@H_403_1@编译

@H_604_18@make defconfig

CONfig_EXT4_FS=y
CONfig_IA32_EMULATION=y
CONfig_VIRTIO_PCI=y (Virtualization -> PCI driver for virtio devices)
CONfig_VIRTIO_BALLOON=y (Virtualization -> Virtio balloon driver)
CONfig_VIRTIO_BLK=y (Device Drivers -> Block -> Virtio block driver)
CONfig_VIRTIO_NET=y (Device Drivers -> Network device support -> Virtio network driver)
CONfig_VIRTIO=y (automatically SELEcted)
CONfig_VIRTIO_RING=y (automatically SELEcted)

@H_403_1@在HOST上禁用NMI监视程序以在GUEST上使用性能计数器.你可以忽略这个.

cat /proc/sys/kernel/nmi_watchdog

@H_403_1@

sudo qemu-system-x86_64 -m 1024M -hda /var/lib/libvirt/images/DEbian.img -enable-kvm -initrd /home/username/compiled_kernel/initrd.img-3.2.46 -kernel /home/username/compiled_kernel/bzImage -append "root=/dev/sda1 console=ttyS0" -nographic -redir tcp:2222::22 -cpu host -smp cores=2

@H_403_1@Kernal路径：/ home / username / compiled_kernel / bzImage
Initrd路径：/home/username/compiled_kernel/initrd.img-3.2.46
内核参数：root = / dev / sda1