Re: [Xen-users] Kernel Panic in booting Xen 3.1 on Dell PowerEdge Server 1950

[Martin Goldstone <m.j.goldstone@xxxxxxxxxxxxxxx>]

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Hmm, I didn't have to make any special config changes, so I'm not sure
whats going on here.  Can you verify that ehci-hcd.ko actually exists in
/lib/modules/2.6.18-xen/kernel/drivers/usb/host/?

Just a thought, are you using 64-bit or 32-bit?  I'm using 64-bit.  And
just to clarify, are you installing from tarball, rpm or source (AFAIK,
rpm install builds the initrd automatically) ?


Mart

Adit Ranadive wrote:
> Oops .. sorry about that .. Here is the xen 3.1 grub.conf:
> 
> default=0
> timeout=15
> splashimage=(hd0,0)/grub/splash.xpm.gz
> hiddenmenu
> title Red Hat Enterprise Linux AS (2.6.9-55.0.6.ELsmp)
>         root (hd0,0)
>         kernel /vmlinuz-2.6.9-55.0.6.ELsmp ro root=LABEL=/ noapic rhgb quiet
>         initrd /initrd-2.6.9-55.0.6.ELsmp.img
> title Red Hat Enterprise Linux AS (2.6.9-55.0.6.EL)
>         root (hd0,0)
>         kernel /vmlinuz-2.6.9-55.0.6.EL ro root=LABEL=/ noapic rhgb quiet
>         initrd /initrd-2.6.9-55.0.6.EL.img
> title Red Hat Enterprise Linux AS (2.6.9-55.ELsmp)
>         root (hd0,0)
>         kernel /vmlinuz-2.6.9-55.ELsmp ro root=LABEL=/ noapic rhgb quiet
>         initrd /initrd-2.6.9-55.ELsmp.img
> title Red Hat Enterprise Linux AS-up (2.6.9-55.EL)
>         root (hd0,0)
>         kernel /vmlinuz-2.6.9-55.EL ro root=LABEL=/ noapic rhgb quiet
>         initrd /initrd-2.6.9-55.EL.img
> title  Xen-SmartIO-2.6 (Compiled)
>         root (hd0,0)
>         kernel /xen-3.1.0.gz
>         module /vmlinuz-2.6.18-xen ro root=/dev/sdb2 console=tty0
>         module /initrd-xen.img
> 
> Nothing unusual about the lines above the kernel panic just the
> regular init stuff.
> 
> I did depmod before mkinitrd but the initrd doesnt seem to be picking
> up the ehci-hcd module for some reason.
> Did you have to do any special config changes to make the initial ramdisk ?
> 
> Thanks,
> Adit
> 
> 
> On 9/18/07, Martin Goldstone <m.j.goldstone@xxxxxxxxxxxxxxx> wrote:
> Hi,
> 
> I've got Xen 3.1 running on a couple of 1950's here with SAS drives (I'm
> running CentOS 5 though, not RHEL4u5, but I can't see that causing the
> problem you're seeing).  I encountered a few problems to begin with, and
> one or two still trip me up when I set up a new server (I swear,
> sometimes it can't decide whether it wants root=LABEL=/ or
> root=/dev/sdXX, mostly its the latter IIRC).  You might want to try
> playing with that.
> 
> I know it might seem stupid, but you did depmod it, didn't you?  That
> caught me out on a couple of occasions.  I'd also make sure you
> explicitly include sd_mod, scsi_mod and any megaraid modules you can
> find in your initrd. Also, your grub.conf doesn't show the same files
> that your mkinitrd command does, can you verify you are definately using
> a kernel that was compiled with xen 3.1?
> 
> Also, is there any meaningful output above those lines that you've
> mentioned from the panic?
> 
> Hope this helps,
> 
> Mart
> 
> Adit Ranadive wrote:
>>>> Hi,
>>>>
>>>> Im having some issues with installing/running Xen 3.1 (source tree
>>>> from the 3.1 tree). The host OS is Red Hat 4 Update 5. Everything is
>>>> downloading and compiling fine.
>>>> The problem arises when I need to create an initrd.
>>>> The server comes with SCSI disks and Im not sure if this version of
>>>> Linux (2.6.18) supports them. I make the initrd with the follwoing
>>>> command:
>>>>
>>>> mkinitrd -v -f initrd-xen.img 2.6.18-xen (i cannot use the
>>>> --omit-scsi-modules since i need them).
>>>>
>>>> It loops on this "Looking for deps of ehci_hcd" . Ive tried changing
>>>> the config flags to build the required scsi modules into the kernel or
>>>> just as modules but it still gives the same error.
>>>> Also if I build it with the --omit-scsi-modules flag and boot into Xen
>>>> I get the Kernel panic error:
>>>>
>>>> mount: error 6 mouting ext3
>>>> mount: error 2 mouting none
>>>> Switching to new root
>>>> switchroot:mount failed: 22
>>>> umount /initrd/dev failed:2
>>>> Kernel panic - not syncing : Attempted to kill init!
>>>>
>>>> Any suggestions on how to fix the drivers to use the scsi hard disks?
>>>>
>>>> Thanks,
>>>> Adit
>>>>
>>>> My fstab file:
>>>>
>>>> LABEL=/                 /                       ext3    defaults        1 1
>>>> LABEL=/boot             /boot                   ext3    defaults        1 2
>>>> none                    /dev/pts                devpts  gid=5,mode=620  0 0
>>>> none                    /dev/shm                tmpfs   defaults        0 0
>>>> LABEL=/home             /home                   ext3    defaults        1 2
>>>> none                    /proc                   proc    defaults        0 0
>>>> none                    /sys                    sysfs   defaults        0 0
>>>> LABEL=SWAP-sda3         swap                    swap    defaults        0 0
>>>> /dev/hda                /media/cdrom            auto
>>>> pamconsole,fscontext=system_u:object_r:removable_t,exec,noauto,managed
>>>> 0 0
>>>> /dev/scd0               /media/cdrom1           auto
>>>> pamconsole,fscontext=system_u:object_r:removable_t,exec,noauto,managed
>>>> 0 0
>>>>
>>>> My grub conf:
>>>>
>>>> default=0
>>>> timeout=15
>>>> splashimage=(hd0,0)/grub/splash.xpm.gz
>>>> hiddenmenu
>>>> title Red Hat Enterprise Linux AS (2.6.9-55.0.6.ELsmp)
>>>>        root (hd0,0)
>>>>        kernel /vmlinuz-2.6.9-55.0.6.ELsmp ro root=LABEL=/ noapic rhgb quiet
>>>>        initrd /initrd-2.6.9-55.0.6.ELsmp.img
>>>> title Red Hat Enterprise Linux AS (2.6.9-55.0.6.EL)
>>>>        root (hd0,0)
>>>>        kernel /vmlinuz-2.6.9-55.0.6.EL ro root=LABEL=/ noapic rhgb quiet
>>>>        initrd /initrd-2.6.9-55.0.6.EL.img
>>>> title Red Hat Enterprise Linux AS (2.6.9-55.ELsmp)
>>>>        root (hd0,0)
>>>>        kernel /vmlinuz-2.6.9-55.ELsmp ro root=LABEL=/ noapic rhgb quiet
>>>>        initrd /initrd-2.6.9-55.ELsmp.img
>>>> title Red Hat Enterprise Linux AS-up (2.6.9-55.EL)
>>>>        root (hd0,0)
>>>>        kernel /vmlinuz-2.6.9-55.EL ro root=LABEL=/ noapic rhgb quiet
>>>>        initrd /initrd-2.6.9-55.EL.img
>>>> title  Xen-SmartIO-2.6 (Compiled)
>>>>        root (hd0,0)
>>>>        kernel /xen.gz
>>>>        module /vmlinuz-2.6.16-rc3-xen0 ro root=/dev/sdb2 console=tty0
>>>>        module /initrd-xen0-1.img
>>>>
>>>>
>>
>>

- --
Martin Goldstone                Keele University, Keele,
IT Systems Administrator        Staffordshire, United Kingdom, ST5 5BG
Computing Services              Telephone: +44 1782 584457

"I feel a great disturbance in the network, as if millions of
processes cried out in terror and were suddenly silenced"
                                                Boyd Duffee
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