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[Xen-devel] Xen unprivileged domain not booting

To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] Xen unprivileged domain not booting
From: Will Andrews <andrewsw@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 20 Aug 2004 17:21:37 -0500
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Hello,

I am using the Xen 1.3 development sources, from the tarball on
the website.  I was able to build and boot linux-2.4.26-xen0 as
Domain 0 on the beater box.  However, I am unable to boot the
unprivileged domain using a separate partition for its root
filesystem.  Both Domain 0 and Domain 1 are using Debian.

I downloaded the xeno-unstable-src.tgz tarball on August 12th.  I
can try a newer version if anyone thinks that will help.

Here's the dmesg & error I'm seeing while attempting to boot
the unprivileged domain (same error with the xenU kernel):

Linux version 2.4.26-xen0 (root@experiment-07) (gcc version 3.3.4 (Debian 
1:3.3.4-6sarge1)) #5 Tue Aug 17 17:13:07 EST 2004
On node 0 totalpages: 24576                
zone(0): 4096 pages.       
zone(1): 20480 pages.
zone(2): 0 pages.    
Kernel command line:  ip=dhcp root=/dev/xda1 ro 4 root=/dev/xda1 ro
Initializing CPU#0                                                 
Xen reported: 547.629 MHz processor.
Calibrating delay loop... 837.22 BogoMIPS
Memory: 93572k/98304k available (2290k kernel code, 4732k reserved, 721k data, 
104k init, 0k highmem)
Dentry cache hash table entries: 16384 (order: 5, 131072 bytes)
Inode cache hash table entries: 8192 (order: 4, 65536 bytes)   
Mount cache hash table entries: 512 (order: 0, 4096 bytes)  
Buffer cache hash table entries: 4096 (order: 2, 16384 bytes)
Page-cache hash table entries: 32768 (order: 5, 131072 bytes)
CPU: L1 I cache: 16K, L1 D cache: 16K                        
CPU: L2 cache: 512K                  
CPU: Intel Pentium III (Katmai) stepping 03
POSIX conformance testing by UNIFIX        
PCI: Probing PCI hardware          
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket                         
Starting kswapd               
Journalled Block Device driver loaded
Installing knfsd (copyright (C) 1996 okir@xxxxxxxxxxxx).
Event-channel device installed.                         
Xen virtual console successfully installed as tty
Starting Xen Balloon driver                      
pty: 256 Unix98 ptys configured
Initialising Xen virtual block device
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
loop: loaded (max 8 devices)                                         
Intel(R) PRO/1000 Network Driver - version 5.2.30.1-k1
Copyright (c) 1999-2004 Intel Corporation.            
pcnet32.c:v1.28 02.20.2004 tsbogend@xxxxxxxxxxxxxxxx
Uniform Multi-Platform E-IDE driver Revision: 7.00beta4-2.4
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
hda: C/H/S=0/0/0 from BIOS ignored                                         
hdb: C/H/S=0/0/0 from BIOS ignored
SCSI subsystem driver Revision: 1.00
Red Hat/Adaptec aacraid driver (1.1-3 Aug 17 2004 15:57:49)
megaraid: v1.18k (Release Date: Thu Aug 28 10:05:11 EDT 2003)
megaraid: no BIOS enabled.                                   
scsi0 : SCSI host adapter emulation for IDE ATAPI devices
LVM version 1.0.8(17/11/2003)                            
Initializing Cryptographic API
Initialising Xen virtual ethernet frontend driver<6>NET4: Linux TCP/IP 1.0 for 
NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 8192 bind 16384)
ip_conntrack version 2.1 (768 buckets, 6144 max) - 288 bytes per conntrack
ip_tables: (C) 2000-2002 Netfilter core team                              
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NET4: Ethernet Bridge 008 for NET4.0               
Bridge firewalling registered       
Can't write to read-only device 0d:01
kjournald starting.  Commit interval 5 seconds
Can't write to read-only device 0d:01         
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem) readonly.      
Freeing unused kernel memory: 104k freed     
INIT: version 2.86 booting              
Activating swap.
Checking root file system...
fsck 1.35 (28-Feb-2004)
/dev/xda1: clean, 14724/915712 files, 82579/1831410 blocks
Error writing block 520 (Attempt to write block from filesystem resulted in 
short write).  

/dev/xda1: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
        (i.e., without -a or -p options)
Error writing block 520 (Attempt to write block from filesystem resulted in 
short write).  
/dev/xda1: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
        (i.e., without -a or -p options)

fsck failed.  Please repair manually and reboot.  Please note
that the root file system is currently mounted read-only.  To
remount it read-write:

   # mount -n -o remount,rw /

CONTROL-D will exit from this shell and REBOOT the system.

Press enter for maintenance
(or type Control-D to continue): 

I checked the filesystem statistics it provided in Domain 0 and
it appears to be close, but not quite the exact same number of
files (including directories and other special files as "files").
Since I've never seen this error before, I really have no idea
what to do.

Regards,
-- 
wca
Purdue University Rosen Center for Advanced Computing
Office: MATH G135 @ Purdue - http://www.itap.purdue.edu/rcs/
NB: crypt.rcs.purdue.edu has retired recently, please use
    andrewsw@xxxxxxxxxxxxxxxxxxxxx for all future contact.


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