Re: [Xen-devel] pvops Domain 0 Creased when boot Xen-unstable on Ubuntu10.04

[Bei Guan <gbtju85@xxxxxxxxx>]

2011/5/18 Todd Deshane <todd.deshane@xxxxxxx>

On Tue, May 17, 2011 at 12:43 PM, Bei Guan <gbtju85@xxxxxxxxx> wrote:
>
>> >         You appear to be getting dumped into a debug shell within the
>> >         initramfs
>> >         so you can quite easily have a poke around and see what's
>> >         going on I
>> >         think.
>> >
>> >
>> > Sorry, can you give me more detail about how to do this? What command
>> > or what others? Many thanks.
>>
>> It's a minimal Linux environment, you should have e.g. "ls" and "cat".
>> Try and find the mount command which is failing.
>
> I did the following command to find the failed mount command. But, it seems
> can't find that. So, is there any problem with my steps and what other work
> can I do?

When you get dropped into the minimal (initramfs) prompt it gives you
some good suggestions.

For example. You can do  "ls /dev" and "cat /proc/modules" and you can
probably even try to run a mount command maybe. You can also
double-check things like "cat /proc/cmdline", etc.

See if you can determine what devices in /dev are actually available,
such as your sda, hda, or xvda devices.

Some boot information got from initramfs is list below. It seems that the /dev/sda9 is available, but there no drivers module in /proc/modules. I also can't mount /dev/sda9 to other directory. So, what's the problem with it? And if a device that need to be mount can't be found in the /dev, what should I do to make it available?

(initramfs) cat /proc/cmdline

nopat root=/dev/sda9 ro console=tty0 console=ttyS0,115200n8 console=hvc0 earlyprintk=xen nomodeset initcall_debug debug loglevel=10

(initramfs) ls /dev

console              ttyS1               hvc6                tty41

null                    ttyS2               hvc7                tty44

pts                    ttyS3               ptmx                tty43

loop0                 rtc0                 tty                 bsg

block                 rtc                   tty0                sg1

loop1                 hidraw0           tty1                tty46

loop3                 ttyS0               tty10               tty45

loop4                 cpu                 tty11               tty47

loop5                 sda                 tty12               tty48

loop2                 disk                tty13               tty49

loop7                 full                  tty14               tty5

ram10                kmem             tty15               tty50

ram7                  kmsg              tty16               tty51

loop6                  mem              tty17               tty52

ram1                  oldmem           tty18               tty53

ram0                   port                tty19               tty54

ram13                 random           tty2                tty55

ram11                 urandom         tty20               tty56

ram3                   zero               tty21               tty57

ram12                 autofs             tty22               tty58

ram15                 blktap-control  tty23               tty59

ram14                 cpu_dma_latency     tty24       tty6

ram9                  mapper            tty26               tty60

ram2                  mcelog             tty27               tty62

ram5                  hpet                 tty28               tty61

ram4                  network_latency        tty29       tty7

ram8                  network_throughput   tty3         tty63

ram6                  rfkill                  tty30               tty9

input                  snapshot           tty32               tty8

char                   net                    tty31               vcs

usbmon3            vga_arbiter         tty25               usbmon0

bus                    watchdog           sr0                 vcsa

adsp                  nvram                scd0                vcs1

audio                  xen                   tty35               vcsa1

dsp                    sequencer          tty36               sda8

snd                     sequencer2       tty34               sda2

mixer                  hvc0                  tty37               sda7

usbmon1             hvc1                  tty33               sda5

usbmon4             hvc2                  tty39               sda6

usbmon5             hidraw1              tty38               sda9

usbmon6             hvc3                  tty4                 sda1

usbmon7             hvc4                  tty42

usbmon2             hvc5                  tty40

(initramfs) cat /proc/modules

(initramfs) 

(initramfs) mount -o /dev/sda9 /root

mount: cannot read /etc/fstab: No such file or directory

(initramfs) ls /etc

modprobe.d     default        lvm            console-setup  udev

(initramfs) fstype /dev/sda9

FSTYPE=ext4dev

FSSIZE=33738981376

(initramfs) ls /

dev      lib64    var      init     conf     scripts  proc

root     lib      bin      etc      sbin     sys      tmp

Thanks

Bei Guan

 

Hope that helps.

Thanks,
Todd

> (initramfs) dmeg | grep mount
> (initramfs)
> (initramfs) cat /proc/mounts
> rootfs / rootfs rw 0 0
> none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
> none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
> none /dev tmpfs rw,relatime,mode=755 0 0
> none /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620 0 0
> (initramfs)
>
> Thanks,
> Bei Guan
>
>>
>> Ian.
>> >
>> >
>> >
>> >
>> >         Ian.
>> >
>> >
>> >
>>
>>
>
>

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>
>



--
Todd Deshane
http://www.linkedin.com/in/deshantm
http://www.xen.org/products/cloudxen.html
http://runningxen.com/

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