Re: [Xen-users] kernel BUG !!

["Yassine AYACHI" <ayachi.yassine@xxxxxxxxx>]

Hi all,

I have the same error althougt I spicify a root entry... I looked everywhere without success... the only case when my VM start was with a 2.6.9-42 kernel but in recovery (maintenance) mode, and a read only file system. bellow my files MyVM.conf and  /etc/fstab :

kernel = "/boot/vmlinuz-2.6.9-78.ELxenU"

ramdisk = "/boot/initrd-2.6.9-78.ELxenU.img"

memory = 256

name = "MYMAC"

vif = [ 'mac=, bridge=xenbr0' ]

disk = [ 'file:/opt/mylan/mymac.img,hda1,w' ]

ip = ''

hostname = name

netmask = "255.255.255.0"

gateway = "192.168.10.74"

root = '/dev/hda1 ro'

extra = "ro selinux=0 3"

>

>

>

/dev/hda1        /                       ext3    defaults        1 1

none                    /dev/pts                devpts  gid=5,mode=620  0 0

none                    /dev/shm                tmpfs   defaults        0 0

none                    /proc                   proc    defaults        0 0

none                    /sys                    sysfs   defaults        0 0

cheers

2008/11/25 Nick Couchman <Nick.Couchman@xxxxxxxxx>

You need to specify a root= entry that matches the root device - the kernel doesn't know where to find the device to mount the / directory.

-Nick

-----Original Message-----
From: Yassine AYACHI <ayachi.yassine@xxxxxxxxx>
To: Nick Couchman <Nick.Couchman@xxxxxxxxx>
Cc: Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] kernel BUG !!
Date: Tue, 25 Nov 2008 17:20:21 +0100

Thanks for replay,

1) CentOS release 5.2 (Final) 2) version 3.0.2 installed by yum 3)Red Hat Enterprise Linux ES release 4 (Nahant Update 7) 4) I tried with all proposed kerlens kernels  2.6.9-78,  2.6.9-78,  2.6.9-55 but they all generate the following error :

Waiting for driver initialization.
Scanning and configuring dmraid supported devices
Scanning logical volumes
Reading all physical volumes. This may take a while...
No volume groups found
Activating logical volumes
Volume group "VolGroup00" not found
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!



PS. How Is it possible to boot with a minimal kernel

Cheers



2008/11/25 Nick Couchman <Nick.Couchman@xxxxxxxxx>

A few questions:

1) What update of CentOS5 are you using on the host?

2) Are you using the Xen version that came with CentOS5, or have you manually installed another version?

3) What update of RHEL4 are you running as the guest?

4) The kernel version referenced in the error message indicates that you have a pretty old kernel - 2.6.9-42, while the more recent RHEL releases are on 2.6.9-78 (the latest) or 2.6.9-67.  You may want to try booting a minimal system in your domU and updating the kernel to a later version and see if that helps.

 

-Nick

>>> "Yassine AYACHI" <ayachi.yassine@xxxxxxxxx> 2008/11/25 06:11 >>>
Hi all,

I'am trying to run a Red Hat Enterprise Linux ES release 4 VM on a centos5 host ... the boot seems gonig without problem, but towards the end I have this error :

------------[ cut here ]------------

kernel BUG at arch/i386/mm/ioremap-xen.c:32!

invalid operand: 0000 [#1]

SMP

Modules linked in: md5(U) ipv6(U) autofs4(U) i2c_dev(U) i2c_core(U) sunrpc(U) ib_sdp(U) ib_ipoib(U) rdma_ucm(U) rdma_cm(U) ib_local_sa(U) findex(U) ib_addr(U) ib_uverbs(U) ib_umad(U) ib_ucm(U) ib_sa(U) ib_cm(U) ib_mad(U) ib_core(U) dm_snapshot(U) dm_zero(U) dm_mirror(U) dm_mod(U) ext3(U) jbd(U)

CPU:    0

EIP:    0061:[<c01132e1>]    Not tainted VLI

EFLAGS: 00010206   (2.6.9-42.0.3.EL.xs0.4.0.263xenU)

EIP is at direct_remap_area_pte_fn+0x19/0x6e

eax: d85ae000   ebx: c130b5a0   ecx: e9000003   edx: 50680000

esi: d85ae000   edi: daa72f28   ebp: d85ae000   esp: daa72eb4

ds: 007b   es: 007b   ss: 0068

Process dchcfg32 (pid: 2027, threadinfo=daa72000 task=ddf4cc30)

Stack: c130b5a0 000185ad 00000000 d85ae000 c0149100 daa72f28 b4600000 b460b000

       b460b000 daab7010 dae2b840 00010000 b45fb000 d8590000 00007ff1 c01134b5

       c01132c8 daa72f28 0000000f d8590100 000f0000 000ef025 00000000 b45fb000

       00010000 00000001 000000f0 00010000 dae2b840 d8590050 dac33284 dac33284

Call Trace:

 [<c0149100>] apply_to_page_range+0x197/0x1de

 [<c01134b5>] __direct_remap_pfn_range+0x17f/0x1cf

 [<c01132c8>] direct_remap_area_pte_fn+0x0/0x6e

 [<c01ee811>] xen_mmap_mem+0x4a/0x52

 [<c014be44>] do_mmap_pgoff+0x48c/0x671

 [<c010d987>] sys_mmap2+0x7e/0xaf

 [<c02564f7>] syscall_call+0x7/0xb

 [<c025007b>] unix_stream_sendmsg+0x147/0x33a

Code: 79 fc ff ff 51 e8 04 b4 0a 00 59 e9 6d fc ff ff 90 90 55 57 56 89 c6 53 89 d3 8b 10 8b 7c 24 14 8b 48 04 85 d2 75 04 85 c9 74 08 <0f> 0b 20 00 04 c4 26 c0 89 da 8b 2f 2b 15 50 1a 36 c0 c1 fa 05

 <0>Fatal exception: panic in 5 seconds

Kernel panic - not syncing: Fatal exception

and it reboot indefinitely

someone know what it is ? Thanks in advance 

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--
Yassine AYACHI
Ingénieur réseaux & systèmes
SQLI MAROC www.sqli.com
yassinegtr4@xxxxxxxxx

---

This e-mail may contain confidential and privileged material for the sole use of the intended recipient. If this email is not intended for you, or you are not responsible for the delivery of this message to the intended recipient, please note that this message may contain SEAKR Engineering (SEAKR) Privileged/Proprietary Information. In such a case, you are strictly prohibited from downloading, photocopying, distributing or otherwise using this message, its contents or attachments in any way. If you have received this message in error, please notify us immediately by replying to this e-mail and delete the message from your mailbox. Information contained in this message that does not relate to the business of SEAKR is neither endorsed by nor attributable to SEAKR.

--
Yassine AYACHI
Ingénieur réseaux & systèmes
SQLI MAROC www.sqli.com
yassinegtr4@xxxxxxxxx

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