gem5完全系统Linux引导失败，“内核恐慌-不是同步: VFS:无法挂载root”
我想在双星 5的fs模式下运行arm的linux系统，我从这个地址下载相关文件：。
我能够配置正确的文件路径，但最终在terminal2中获得了这个输出：
[ 0.661620] No filesystem could mount root, tried:
[ 0.661621] ext3
[ 0.661650] ext4`enter code here`
[ 0.661663] ext2
[ 0.661676] vfat
[ 0.661690] fuseblk
[ 0.661703]
[ 0.661728] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(254,0)在terminal1中得到了这个糟糕的输出：
warn: Tried to read RealView I/O at offset 0x60 that doesn't exist
warn: Tried to write RVIO at offset 0xa8 (data 0) that doesn't exist
warn: Kernel panic in simulated kernel我可以提供命令行输入，但是简单地调整内部的配置只会导致相同的结果：
./build/ARM/gem5.opt configs/example/arm/starter_fs.py --cpu="minor" --num-cores=4 --disk-image=/home/ad/GEM5/ARM_GEM5/gem5/my_image/disks/aarch64-ubuntu-trusty-headless.img --dtb=/home/ad/GEM5/ARM_GEM5/gem5/my_image/binaries/armv7_gem5_v1_4cpu.dtb --kernel=/home/ad/GEM5/ARM_GEM5/gem5/my_image/binaries/vmlinux我怎么才能解决这个问题？致以敬意，
回答 2
Stack Overflow用户
发布于 2020-08-06 07:08:21
下面是针对这类问题的完整诊断过程：https://askubuntu.com/questions/41930/kernel-panic-not-syncing-vfs-unable-to-mount-root-fs-on-unknown-block0-0/1048477#1048477
总之，你必须确保：
- 内核具有读取磁盘类型的配置，通常用于模拟： CONFIG_VIRTIO_PCI=y CONFIG_VIRTIO_BLK=y 这似乎是问题所在，因为上面没有分区列表？请确认。如果没有，内核似乎无法从磁盘读取字节。
- 内核具有读取文件系统类型的配置。但是内核提到not 2，3，4，所以很可能这不是问题所在。
- 您正在将root=内核CLI指向正确的分区。
还请参阅：https://cirosantilli.com/linux-kernel-module-cheat/#not-syncing，它还包含一个只起作用的Buildroot设置。
我还强烈建议您首先让它在引导速度更快的QEMU上工作。
Stack Overflow用户
发布于 2020-08-17 08:52:34
我也有过类似的问题。试图在64位内核下(从gem5网站)运行Ubuntu和Linaro的全系统仿真，并使用原始的starter_fs.py脚本，这让我感到内核恐慌：
[ 0.224367] List of all partitions:
[ 0.224394] fe00 1048320 vda
[ 0.224397] driver: virtio_blk
[ 0.224440] fe01 1048288 vda1 00000000-01
[ 0.224441]
[ 0.224480] No filesystem could mount root, tried:
[ 0.224481] ext3
[ 0.224510] ext4
[ 0.224524] ext2
[ 0.224537] squashfs
[ 0.224551] vfat
[ 0.224566] fuseblk
[ 0.224579]
[ 0.224606] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(254,0)
[ 0.224656] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.18.0+ #1
[ 0.224692] Hardware name: V2P-CA15 (DT)
[ 0.224717] Call trace:
[ 0.224741] dump_backtrace+0x0/0x1c0
[ 0.224765] show_stack+0x14/0x20
[ 0.224790] dump_stack+0x8c/0xac
[ 0.224812] panic+0x130/0x288
[ 0.224836] mount_block_root+0x22c/0x294
[ 0.224861] mount_root+0x140/0x174
[ 0.224884] prepare_namespace+0x138/0x180
[ 0.224910] kernel_init_freeable+0x1c0/0x1e0
[ 0.224939] kernel_init+0x10/0x108
[ 0.224961] ret_from_fork+0x10/0x18
[ 0.224987] Kernel Offset: disabled
[ 0.225009] CPU features: 0x21c06492
[ 0.225032] Memory Limit: 2048 MB
[ 0.225056] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(254,0) ]---奇怪的是，几周前，它就像一种魅力。这个问题存在于内核命令行上根分区的规范中。在starter_fs.py中，更改了这一行
"root=/dev/vda",
通过这一点：
"root=/dev/vda1",
您可以看到，在此之前，指定了VirtIO 块装置。内核需要一个分区，而不是块设备。然后，您可以运行gem5。
build/ARM/gem5.opt -configs/example/arm/starter_fs.py --cpu="hpi" --num-cores=1 --disk-image="linaro-minimal-aarch64.img" --kernel="vmlinux.arm64"
对我来说，内核恐慌已经消失了，，我能够再次引导我的系统--
[ 0.228847] EXT4-fs (vda1): mounted filesystem without journal. Opts: (null)
[ 0.228906] VFS: Mounted root (ext4 filesystem) on device 254:1.
[ 0.229539] devtmpfs: mounted
[ 0.229792] Freeing unused kernel memory: 448K
INIT: version 2.88 booting
[ 0.234168] random: fast init done
Starting udev
[ 0.277039] udevd[715]: starting version 182
[ 0.411534] EXT4-fs (vda1): re-mounted. Opts: block_validity,delalloc,barrier,user_xattr
Starting Bootlog daemon: bootlogd.
[ 0.426573] random: dd: uninitialized urandom read (512 bytes read)
Populating dev cache
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.rp_filter = 1
hwclock: can't open '/dev/misc/rtc': No such file or directory
Mon Jan 27 08:00:00 UTC 2014
hwclock: can't open '/dev/misc/rtc': No such file or directory
INIT: Entering runlevel: 5
Configuring network interfaces... ifconfig: SIOCGIFFLAGS: No such device
Starting rpcbind daemon...rpcbind: cannot create socket for udp6
rpcbind: cannot create socket for tcp6
done.
rpcbind: cannot get uid of '': Success
creating NFS state directory: done
starting statd: done
Starting auto-serial-console: done
Stopping Bootlog daemon:
bootlogd.
Last login: Mon Jan 27 08:00:00 UTC 2014 on tty1
INIT: no more processes left in this runlevel
root@genericarmv8:~# id
id
uid=0(root) gid=0(root) groups=0(root)
root@genericarmv8:~#https://stackoverflow.com/questions/63277677
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