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

[Bei Guan <gbtju85@gmail.com>]

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2011/5/17 Ian Campbell <Ian.Campbell@eu.citrix.com>

> On Tue, 2011-05-17 at 16:48 +0100, Bei Guan wrote:
> >
> >
> > 2011/5/17 Ian Campbell <Ian.Campbell@citrix.com>
> >
> >         On Tue, 2011-05-17 at 16:27 +0100, Bei Guan wrote:
> >         >
> >         >
> >         > 2011/5/17 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> >         >         > menuentry "Ubuntu_Xen 4.2 (2.6.32.28)" {
> >         >         > recordfail
> >         >         > insmod ext2
> >         >         > set root='(hd0,9)'
> >         >         > search --no-floppy --fs-uuid --set
> >         >         59c64afa-47a8-4a5f-a4cf-dbe3be20cc15
> >         >         >         multiboot /boot/xen.gz dom0_mem=1024M
> >         loglvl=all
> >         >         guest_loglvl=all
> >         >         > sync_console console_to_ring com1=115200,8n1
> >         console=com1
> >         >         lapic=debug
> >         >         > apic_verbosity=debug apic=debug iommu=off
> >         >         > module /boot/vmlinuz-2.6.32.28 nopat
> >         >         > root=UUID=59c64afa-47a8-4a5f-a4cf-dbe3be20cc15 ro
> >         >         console=tty0
> >         >         > console=ttyS0,115200n8 console=hvc0
> >         earlyprintk=xen
> >         >         nomodeset initcall_debug
> >         >         > debug loglevel=10
> >         >         > module /boot/initrd.img-2.6.32.28
> >         >         > }
> >         >         >
> >         >         > In the debug, there is message like this:
> >         >         >
> >         >         > Loading, please wait...
> >         >         > mount: mounting none on /dev failed: No such
> >         device
> >         >
> >         >
> >         >
> >         >         So your /dev/sda is being seen. Not sure why the
> >         UUID hasn't
> >         >         been read, but
> >         >         you could do 'root=/dev/sdaX' where X is the correct
> >         root
> >         >         partition.
> >         >
> >         >         This would replace the 'UUID=59...'.
> >         >
> >         > I just tried this. Because the /dev/sda9 is the root fs, so
> >         I used
> >         > 'root=/dev/sda9' to replace the original one. But it also
> >         the same
> >         > error as the following. Detailed is also attached.
> >         >
> >         >
> >         > Loading, please wait...
> >         > mount: mounting none on /dev failed: No such device
> >
> >
> >         This is trying to mount something on /dev, presumably a TMPFS
> >         or
> >         DEVTMPFS or similar, this fails which apparently cascades into
> >         not
> >         finding the disk.
> >
> >         I suggest you have a dig into your initramfs and try and
> >         figure out what
> >         specifically it is trying to do and what requirements your
> >         distro has
> >         put on the kernel configuration.
> >
> >         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?

(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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