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Re: [Xen-devel] a Xandos data dump

To: tcranbrook@xxxxxxxxxxxxx
Subject: Re: [Xen-devel] a Xandos data dump
From: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>
Date: Tue, 28 Sep 2004 22:00:09 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxxx, Ian.Pratt@xxxxxxxxxxxx
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> While trying to track down the problem with booting Xandros, I got the
> attached data dump.  This is the entire console session.  Is this coming
> from Xen?

Nope. The crashdump is coming from the -xenU kernel. It seems to
be crashing in reiserfs, but I suspect this isn't the real

"unable to open initial console" is interesting. Has your
reiserfs root filesystem got a /dev/console device? What's the

Further, the "obsolete bdflush system call" suggests that the
file system is intended for an older 2.4 kernel rather than 2.6
(have you tried building a 2.4 Xen kernel -- "make linux24")?

The "set iopl to 3" is harmless, but suggests that something in
your init scripts is trying to access hardware very early on. 
This is unlikely to cause things to break, but it's worth
eliminating. Perhaps there's a hwclock invocation in rc.sysinit?

One other thing to watch out for is that your /etc/fstab should
contain real device names rather than LABEL= lines. Also, don't
use devfs.

If you're able, put a tar ball of the installation up somewhere
on the web so that we can download and try and reproduce (tar

> I hope the attachment works in this list machinery.  Didn't want to put
> this much text into the archive.
> RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
> Xen virtual console successfully installed as tty
> Event-channel device installed.
> Initialising Xen virtual block device
> Initialising Xen virtual ethernet frontend driver.
> Using anticipatory io scheduler
> Netfront recovered tx=0 rxfree=0
> NET: Registered protocol family 2
> IP: routing cache hash table of 512 buckets, 4Kbytes
> TCP: Hash tables configured (established 4096 bind 8192)
> NET: Registered protocol family 1
> NET: Registered protocol family 17
> IP-Config: Complete:
>       device=eth0, addr=, mask=, gw=,
>      host=, domain=, nis-domain=(none),
>      bootserver=, rootserver=, rootpath=
> ReiserFS: hdb1: found reiserfs format "3.6" with standard journal
> ReiserFS: hdb1: using ordered data mode
> ReiserFS: hdb1: journal params: device hdb1, size 8192, journal first block 
> 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30
> ReiserFS: hdb1: checking transaction log (hdb1)
> ReiserFS: hdb1: Using r5 hash to sort names
> VFS: Mounted root (reiserfs filesystem).
> Freeing unused kernel memory: 92k freed
> Warning: unable to open an initial console.
> ioperm not fully supported - set iopl to 3
> warning: process `update' used the obsolete bdflush system call
> Fix your initscripts?
> Unable to handle kernel paging request at virtual address c13ae000
>  printing eip:
> c019de16
> *pde = ma 0122b067 pa 00004067
> *pte = ma 0bbc8061 pa 013ae061
>  [<c019e510>] leaf_copy_items+0xe8/0x17f

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