[SOLVED] No filesystem could mount root and then a kernel panic Debian 7.5.0 PowerPC

New2Linux2 · 07-23-2014, 06:24 PM

I just finished installing debian 7.5.0 PowerPC on an IBM eServer P5 with 4 U320 SCSI hard drives. This is a clean install with no prior OS, no version of VIOS or AIX and not using an IBM HMC.

After getting Debian to install, on first boot into the OS, I get a kernel panic.

Code:

Please wait, loading kernel...
   Elf64 kernel loaded...
Loading ramdisk...
ext2: i/o error 2133571364 in read
ramdisk loaded at 01700000, size: 8192 Kbytes
OF stdout device is: /vdevice/vty@30000001
Preparing to boot Linux version 3.2.0-4-powerpc64 (debian-kernel@lists.debian.org) (gcc 

version 4.6.3 (Debian 4.6.3-11) ) #1 SMP Debian 3.2.57-3
Detected machine type: 0000000000000101
Max number of cores passed to firmware: 16 (NR_CPUS = 32)
Calling ibm,client-architecture-support... not implemented
command line: root=UUID=1d82c29b-5695-47a8-a85f-5114665b0ef7 ro
memory layout at init:
  memory_limit : 0000000000000000 (16 MB aligned)
  alloc_bottom : 0000000001f00000
  alloc_top    : 0000000008000000
  alloc_top_hi : 00000001f0000000
  rmo_top      : 0000000008000000
  ram_top      : 00000001f0000000
instantiating rtas at 0x00000000076a1000... done
Querying for OPAL presence... not there.
boot cpu hw idx 0
copying OF device tree...
Building dt strings...
Building dt structure...
Device tree strings 0x0000000003001000 -> 0x0000000003002354
Device tree struct  0x0000000003003000 -> 0x0000000003017000
[    0.000000] Using pSeries machine description
[    0.000000] Using 1TB segments
[    0.000000] Found initrd at 0xc000000001700000:0xc000000001f00000
[    0.000000] bootconsole [udbg0] enabled
[    0.000000] Partition configured for 2 cpus.
[    0.000000] CPU maps initialized for 2 threads per core
[    0.000000] Starting Linux PPC64 #1 SMP Debian 3.2.57-3
[    0.000000] -----------------------------------------------------
[    0.000000] ppc64_pft_size                = 0x1b
[    0.000000] physicalMemorySize            = 0x1f0000000
[    0.000000] htab_hash_mask                = 0xfffff
[    0.000000] -----------------------------------------------------
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 3.2.0-4-powerpc64 (debian-kernel@lists.debian.org) (gcc version 

4.6.3 (Debian 4.6.3-11) ) #1 SMP Debian 3.2.57-3
[    0.000000] [boot]0012 Setup Arch
[    0.000000] PCI host bridge /pci@800000020000002  ranges:
[    0.000000]   IO 0x000003fe00200000..0x000003fe002fffff -> 0x0000000000000000
[    0.000000]  MEM 0x0000040040000000..0x000004007fffffff -> 0x00000000c0000000
[    0.000000] PCI host bridge /pci@800000020000003  ranges:
[    0.000000]   IO 0x000003fe00300000..0x000003fe003fffff -> 0x0000000000000000
[    0.000000]  MEM 0x0000040080000000..0x00000400bfffffff -> 0x00000000c0000000
[    0.000000] PCI host bridge /pci@800000020000004  ranges:
[    0.000000]   IO 0x000003fe00400000..0x000003fe004fffff -> 0x0000000000000000
[    0.000000]  MEM 0x00000400c0000000..0x00000400ffffffff -> 0x00000000c0000000
[    0.000000] EEH: PCI Enhanced I/O Error Handling Enabled
[    0.000000] PPC64 nvram contains 7168 bytes
[    0.000000] Zone PFN ranges:
[    0.000000]   DMA      0x00000000 -> 0x001f0000
[    0.000000]   Normal   empty
[    0.000000] Movable zone start PFN for each node
[    0.000000] early_node_map[1] active PFN ranges
[    0.000000]     0: 0x00000000 -> 0x001f0000
[    0.000000] [boot]0015 Setup Done
[    0.000000] PERCPU: Embedded 13 pages/cpu @c000000000b00000 s20608 r0 d32640 u524288
[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 2003840
[    0.000000] Policy zone: DMA
[    0.000000] Kernel command line: root=UUID=1d82c29b-5695-47a8-a85f-5114665b0ef7 ro
[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[    0.000000] freeing bootmem node 0
[    0.000000] Memory: 7982944k/8126464k available (7056k kernel code, 143520k reserved, 1312k 

data, 1922k bss, 432k init)
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  CONFIG_RCU_FANOUT set to non-default value of 32
[    0.000000]  RCU dyntick-idle grace-period acceleration is enabled.
[    0.000000] NR_IRQS:512
[    0.000000] clocksource: timebase mult[7cfc80] shift[22] registered
[    0.000000] Console: colour dummy device 80x25
[    0.000000] console [hvc0] enabled, bootconsole disabled
[    0.000000] console [hvc0] enabled, bootconsole disabled
[    0.000568] pid_max: default: 32768 minimum: 301
[    0.000747] Security Framework initialized
[    0.000759] AppArmor: AppArmor disabled by boot time parameter
[    0.002209] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
[    0.007085] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
[    0.009202] Mount-cache hash table entries: 256
[    0.017257] Initializing cgroup subsys cpuacct
[    0.017279] Initializing cgroup subsys memory
[    0.017454] Initializing cgroup subsys devices
[    0.017462] Initializing cgroup subsys freezer
[    0.017470] Initializing cgroup subsys net_cls
[    0.017478] Initializing cgroup subsys blkio
[    0.017493] Initializing cgroup subsys perf_event
[    0.017613] POWER5+/++ performance monitor hardware support registered
[    0.019048] Brought up 2 CPUs
[    0.019501] devtmpfs: initialized
[    0.028995] print_constraints: dummy:
[    0.029141] NET: Registered protocol family 16
[    0.029163] IBM eBus Device Driver
[    0.033740] PCI: Probing PCI hardware
[    0.034836] IOMMU table initialized, virtual merging enabled
[    0.073593] opal: Node not found
[    0.075062] bio: create slab <bio-0> at 0
[    0.075409] vgaarb: loaded
[    0.075673] SCSI subsystem initialized
[    0.075986] Switching to clocksource timebase
[    0.084320] NET: Registered protocol family 2
[    0.084829] IP route cache hash table entries: 262144 (order: 9, 2097152 bytes)
[    0.087362] TCP established hash table entries: 524288 (order: 11, 8388608 bytes)
[    0.090736] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
[    0.091189] TCP: Hash tables configured (established 524288 bind 65536)
[    0.113098] TCP reno registered
[    0.113130] UDP hash table entries: 4096 (order: 5, 131072 bytes)
[    0.113215] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes)
[    0.113465] NET: Registered protocol family 1
[    0.224882] Unpacking initramfs...
[    0.486170] Initramfs unpacking failed: read error
[    0.486183] Freeing initrd memory: 8192k freed
[    0.487793] vio 30000000: Warning: IOMMU dma not supported: mask 0xffffffffffffffff, table 

unavailable
[    0.487858] vio 30000001: Warning: IOMMU dma not supported: mask 0xffffffffffffffff, table 

unavailable
[    0.487902] vio 4000: Warning: IOMMU dma not supported: mask 0xffffffffffffffff, table 

unavailable
[    0.487944] vio 4001: Warning: IOMMU dma not supported: mask 0xffffffffffffffff, table 

unavailable
[    0.487985] vio 4002: Warning: IOMMU dma not supported: mask 0xffffffffffffffff, table 

unavailable
[    0.488247] Hypercall H_BEST_ENERGY not supported
[    0.488603] audit: initializing netlink socket (disabled)
[    0.488624] type=2000 audit(1406155635.483:1): initialized
[    0.555974] HugeTLB registered 16 MB page size, pre-allocated 0 pages
[    0.555985] HugeTLB registered 16 GB page size, pre-allocated 0 pages
[    0.556549] VFS: Disk quotas dquot_6.5.2
[    0.556653] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.556801] msgmni has been set to 15609
[    0.557113] alg: No test for stdrng (krng)
[    0.557178] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
[    0.557191] io scheduler noop registered
[    0.557199] io scheduler deadline registered
[    0.557253] io scheduler cfq registered (default)
[    0.558263] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    0.604110] pmac_zilog: 0.6 (Benjamin Herrenschmidt <benh@kernel.crashing.org>)
[    0.604150] Linux agpgart interface v0.103
[    0.604387] mousedev: PS/2 mouse device common for all mice
[    0.604543] rtc-generic rtc-generic: rtc core: registered rtc-generic as rtc0
[    0.604936] TCP cubic registered
[    0.605079] NET: Registered protocol family 10
[    0.606096] Mobile IPv6
[    0.606103] NET: Registered protocol family 17
[    0.606114] Registering the dns_resolver key type
[    0.606357] registered taskstats version 1
[    0.610257] rtc-generic rtc-generic: setting system clock to 2014-07-23 22:47:16 UTC 

(1406155636)
[    0.610282] Initializing network drop monitor service
[    0.610478] List of all partitions:
[    0.610486] No filesystem could mount root, tried:
[    0.610498] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[    0.610509] Call Trace:
[    0.610519] [c0000001eedefc30] [c000000000013524] .show_stack+0x80/0x130 (unreliable)
[    0.610536] [c0000001eedefce0] [c0000000004bacbc] .panic+0x88/0x204
[    0.610550] [c0000001eedefd80] [c000000000678f38] .mount_block_root+0x2b0/0x2c8
[    0.610563] [c0000001eedefe50] [c00000000067913c] .prepare_namespace+0x170/0x1b0
[    0.610575] [c0000001eedefee0] [c000000000678b10] .kernel_init+0x20c/0x214
[    0.610587] [c0000001eedeff90] [c00000000001ca4c] .kernel_thread+0x54/0x70
[    0.615053] Rebooting in 180 seconds..

This has me a bit stumped. The closest I can find on here is a post from 3 years ago, so it was no help (LILO instead of GRUB). Thanks in advance.

business_kid · 07-24-2014, 02:37 PM

Quote:

ext2: i/o error 2133571364 in read

That was line 3 or 4. It's a bad start.
No filesystem could mount root is because
a. you don't have a module for the root filesystem in the ramdisk.
b. The ramdisk is corrupt
c. The root= bit of the kernel boot line is wrong, so it's checking the wrong place.

New2Linux2 · 07-24-2014, 02:42 PM

Thanks for the info, business kid. Now for the important part: how do I fix it?

This is a clean install of Debian 7.5.0 PowerPC with no other OS on the hardware.
They don't make a liveCD for this architecture.
Do I simply wipe it and install again or is this a bug for the distro developers?
Should I try a different distro for this hardware?

Any further help would be great. Thank you.

Pearlseattle · 07-24-2014, 02:52 PM

Hi
I don't see any "proposals" after the error message "No filesystem could mount root, tried:", nor I think to see any drive-related messages above => I would think that you have in your kernel no drivers/modules that can access the storage device on which the rootfs resides.

New2Linux2 · 07-24-2014, 03:42 PM

Nevermind. I found it myself. It is a reported bug. It seems a reinstall is the fix, but selecting to only install the drivers for the detected hardware. I've been doing a generic install, which triggered this particular bug. More info here:

https://bugs.debian.org/cgi-bin/bugr...cgi?bug=719479

Thanks business kid and Pearlseattle.