Linux 2.6.8-rc4 boot "Kernel panic: Attempted to kill init!" as mounting on NFS (older) version 2 (on Red Hat File Server)

From: Povolotsky, Alexander
Date: Sat Oct 09 2004 - 14:00:42 EST

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Hi,

I am guessing that the kernel panic (see below) is caused
by NFS version incompatibility.
I (think that I) prooved it by being able to "manually" mount by
specifying NFS version 2 after booting with RAMDISK -
see that part of my email (some errors were thrown but the
mount was completed).

Should the kernel be configured to
allow to NFS mount root file system onto the NFS server,
which runs version 2 ?

I do not see the kernel option to configure NFS version 2 ...
Here is what I have:

CONFIG_NFS_FS=y
# CONFIG_NFS_V3 is not set
# CONFIG_NFS_V4 is not set
# CONFIG_NFS_DIRECTIO is not set
# CONFIG_NFSD is not set
CONFIG_ROOT_NFS=y
CONFIG_LOCKD=y

Or is it a bug ?
>
Thanks,
Alex
> -----Original Message-----
> From: Povolotsky, Alexander
> Sent: Tuesday, September 28, 2004 4:21 PM
> To: 'linux-kernel@xxxxxxxxxxxxxxx'
> Subject: Linux 2.6.8-rc4 "Kernel panic: Attempted to
> kill init!" - after replacing /fadsroot on the Linux NFSserver with the
> one from Arabella cdrom
>
> Hi,
>
> I have built (cross-compiled for ppc 82xx) Linux 2.6.8-rc4
> kernel and am trying to boot it on PQ2FADS-VR.
>
> I am getting: boot time "Kernel panic: Attempted to kill
> init!" on the remote Linux NFS server with
Red Hat Linux release 9 (Shrike) Kernel 2.4.20-28.9 on an
i686, which runs "older" NFS version (version 2).

> Thanks,
> Best Regards,
> Povolotsky, Alexander
> *****************************
> => printenv
> bootdelay=5
> bootcmd=bootm 200000
> ethaddr=08:00:17:00:00:03
> serverip=192.168.0.3
> ipaddr=192.168.0.5
> baudrate=9600
> bootargs=root=/dev/nfs rw nfsroot=192.168.0.4:/fadsroot
> stdin=serial
> stdout=serial
> stderr=serial
>
> Environment size: 210/262140 bytes
> => tftpboot 200000 uimage
> Using FCC2 ETHERNET device
> TFTP from server 192.168.0.3; our IP address is 192.168.0.5
> Filename 'uimage'.
> Load address: 0x200000
> Loading:
> #################################################################
>
> #################################################################
> #######################################
> done
> Bytes transferred = 864364 (d306c hex)
> => bootm 200000
> ## Booting image at 00200000 ...
> Image Name: Linux-2.6.8-rc4
> Image Type: PowerPC Linux Kernel Image (gzip
> compressed)
> Data Size: 864300 Bytes = 844 kB
> Load Address: 00000000
> Entry Point: 00000000
> Verifying Checksum ... OK
> Uncompressing Kernel Image ... OK
> Linux version 2.6.8-rc4 (apovolot@USPITLAD104868) (gcc
> version 3.3.2) #5 Mon Aug
> 16 08:49:38 EDT 2004
> PQ2 ADS Port
> Built 1 zonelists
> Kernel command line: root=/dev/nfs rw
> nfsroot=192.168.0.4:/fadsroot nobats ip=19
> 2.168.0.5
> PID hash table entries: 256 (order 8: 2048 bytes)
> Warning: real time clock seems stuck!
> Dentry cache hash table entries: 8192 (order: 3, 32768
> bytes)
> Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
> Memory: 30432k available (1348k kernel code, 324k data, 272k
> init, 0k highmem)
> Calibrating delay loop... 131.07 BogoMIPS
> Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
> NET: Registered protocol family 16
> PCI: Probing PCI hardware
> Generic RTC Driver v1.07
> Serial: CPM driver $Revision: 0.01 $
> ttyCPM0 at MMIO 0xf0011a00 (irq = 40) is a CPM UART
> RAMDISK driver initialized: 16 RAM disks of 32768K size 1024
> blocksize
> loop: loaded (max 8 devices)
> eth0: FCC ENET Version 0.3, 08:00:17:40:00:03
> NET: Registered protocol family 2
> IP: routing cache hash table of 512 buckets, 4Kbytes
> TCP: Hash tables configured (established 2048 bind 4096)
> NET: Registered protocol family 1
> NET: Registered protocol family 17
> IP-Config: Guessing netmask 255.255.255.0
> IP-Config: Complete:
> device=eth0, addr=192.168.0.5, mask=255.255.255.0,
> gw=255.255.255.255,
> host=192.168.0.5, domain=, nis-domain=(none),
> bootserver=255.255.255.255, rootserver=192.168.0.4,
> rootpath=
> Looking up port of RPC 100003/2 on 192.168.0.4
> Looking up port of RPC 100005/1 on 192.168.0.4
> VFS: Mounted root (nfs filesystem).
> Freeing unused kernel memory: 272k init
> Kernel panic: Attempted to kill init!
> <0>Rebooting in 180 seconds..
>
*******
To work around my original problem (see above) ,
I am booting with ramdisk as root filesystem server and then
trying to manually mount the /fadsroot exported on the
above described Linux NFS server - I am getting errors ( but
mounting still works) ...

Could anyone on this list determine (guess) what is the
reason for errors (see below) ?

Thanks,
Alex

=> printenv
bootdelay=5
bootcmd=bootm 200000
ethaddr=08:00:17:00:00:03
serverip=192.168.0.3
ipaddr=192.168.0.5
baudrate=9600
bootargs=root=/dev/nfs rw nfsroot=192.168.0.4:/fadsroot
stdin=serial
stdout=serial
stderr=serial

Environment size: 210/262140 bytes
=> setenv bootargs root=/dev/ram rw
ip=192.168.0.5:255.255.255.0
=> saveenv
Saving Environment to Flash...
.
Un-Protected 1 sectors
Erasing Flash...
. done
Erased 1 sectors
Writing to Flash... done
.
Protected 1 sectors
=> tftpboot 200000 uimage
Using FCC2 ETHERNET device
TFTP from server 192.168.0.3; our IP address is 192.168.0.5
Filename 'uimage'.
Load address: 0x200000
Loading:
#################################################################

#################################################################
#######################################
done
Bytes transferred = 864364 (d306c hex)
=> bootm 200000 FF800000
## Booting image at 00200000 ...
Image Name: Linux-2.6.8-rc4
Image Type: PowerPC Linux Kernel Image (gzip
compressed)
Data Size: 864300 Bytes = 844 kB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at ff800000 ...
Image Name: Simple Embedded Linux Framework
Image Type: PowerPC Linux RAMDisk Image (gzip
compressed)
Data Size: 1400198 Bytes = 1.3 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Loading Ramdisk to 01a37000, end 01b8cd86 ... OK
Linux version 2.6.8-rc4 (apovolot@USPITLAD104868) (gcc
version 3.3.2) #5 Mon Aug
16 08:49:38 EDT 2004
PQ2 ADS Port
Built 1 zonelists
Kernel command line: root=/dev/ram rw
ip=192.168.0.5:255.255.255.0 nobats ip=192
.168.0.5
PID hash table entries: 256 (order 8: 2048 bytes)
Warning: real time clock seems stuck!
Dentry cache hash table entries: 8192 (order: 3, 32768
bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 29064k available (1348k kernel code, 324k data, 272k
init, 0k highmem)
Calibrating delay loop... 131.07 BogoMIPS
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
checking if image is initramfs...it isn't (no cpio magic);
looks like an initrd
Freeing initrd memory: 1367k freed
NET: Registered protocol family 16
PCI: Probing PCI hardware
Generic RTC Driver v1.07
Serial: CPM driver $Revision: 0.01 $
ttyCPM0 at MMIO 0xf0011a00 (irq = 40) is a CPM UART
RAMDISK driver initialized: 16 RAM disks of 32768K size 1024
blocksize
loop: loaded (max 8 devices)
eth0: FCC ENET Version 0.3, 08:00:17:40:00:03
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 2048 bind 4096)
NET: Registered protocol family 1
NET: Registered protocol family 17
IP-Config: Guessing netmask 255.255.255.0
IP-Config: Complete:
device=eth0, addr=192.168.0.5, mask=255.255.255.0,
gw=255.255.255.255,
host=192.168.0.5, domain=, nis-domain=(none),
bootserver=255.255.255.0, rootserver=255.255.255.0,
rootpath=
RAMDISK: Compressed image found at block 0
VFS: Mounted root (ext2 filesystem).
Freeing unused kernel memory: 272k init
serial console detected. Disabling virtual terminals.

BusyBox v0.60.1 (2002.10.24-02:29+0000) Built-in shell (msh)
Enter 'help' for a list of built-in commands.

# ### Application running ...

# mount -o mountvers=2 192.168.0.4:/fadsroot /tmp
nfs warning: mount version older than kernel

portmap: server localhost not responding, timed out
RPC: failed to contact portmap (errno -5).

portmap: server localhost not responding, timed out
RPC: failed to contact portmap (errno -5).
lockd_up: makesock failed, error=-5
### Application running ...
portmap: server localhost not responding, timed out
RPC: failed to contact portmap (errno -5).
#
#
# cd tmp
# ls
XXX gdbserver mnt sbin
bin hello ncurses-5.4 sys
boot hello.c opt tmp
cardmgr home pciutils-2.1.10 ttyp0
cdrom initrd proc usr
dev lib ptyp0 var
etc lmbench-3.0-a4 root
floppy main.elf runin
#
>
>
>
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Next message: Chris Wright: "Re: [PATCH] Realtime LSM"
Previous message: Mark Mielke: "Re: UDP recvmsg blocks after select(), 2.6 bug?"
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