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Re: [Xen-users] kernel panic on boot of dom0

On Friday 18 November 2005 14:59, Ian P. Christian wrote:
> I'll recompile a kernel starting with teh defaults specified in
> xen0_defconfig, and see how things go.

Well, no opps on boot now, but having attempted to start a domU, I'm seeing 
what apepars to the the same opps as before.

Thanks for your help people, much appreciated

# xm create /etc/xen/auto/ttylinux -c
Using config file "/etc/xen/auto/ttylinux".
Started domain ttylinux
Linux version (root@bb3) (gcc version 3.4.4 (Gentoo 3.4.4-r1, 
ssp-3.4.4-1.0, pie-8.7.8)) #2 SMP Fri Nov 18 15:47:14 GMT 2005
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000004000000 (usable)
0MB HIGHMEM available.
72MB LOWMEM available.
IRQ lockup detection disabled
Built 1 zonelists
Kernel command line:  ip= root=/dev/sda1 ro
Initializing CPU#0
PID hash table entries: 512 (order: 9, 8192 bytes)
Xen reported: 2800.104 MHz processor.
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
vmalloc area: c5000000-fb7fe000, maxmem 34000000
Memory: 62320k/73728k available (1369k kernel code, 3072k reserved, 404k data, 
128k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Mount-cache hash table entries: 512
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 1024K
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... disabled
Brought up 1 CPUs
NET: Registered protocol family 16
Brought up 1 CPUs
xen_mem: Initialising balloon driver.
SCSI subsystem initialized
Grant table initialized
Number of CPUs sharing cache didn't match any known set of CPUs
Number of CPUs sharing cache didn't match any known set of CPUs
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
Xen virtual console successfully installed as tty1
Event-channel device installed.
xen_net: Initialising virtual ethernet driver.
NET: Registered protocol family 2
Registering block device major 8
register_blkdev: cannot get major 8 for sd
xen_blk: can't get major 8 with name sd
Unable to handle kernel NULL pointer dereference at virtual address 00000104
 printing eip:
*pde = ma 00000000 pa 55555000
Oops: 0002 [#1]
Modules linked in:
CPU:    0
EIP:    0061:[<c01dfaa7>]    Not tainted VLI
EFLAGS: 00010296   (
EIP is at blk_start_queue+0x8/0x4f
eax: 00000000   ebx: 00000000   ecx: 00000000   edx: fbfc4000
esi: c039c004   edi: c03fbc23   ebp: c0345f6c   esp: c0345efc
ds: 007b   es: 007b   ss: 0069
Process xenwatch (pid: 7, threadinfo=c0344000 task=c032fa20)
Stack: 00000000 c039c000 c01f107a 00000000 c039c000 c01f1aa3 c039c000 00000000
       00000801 00000000 00000200 c039c000 c02640d1 c0345f48 c026a147 c0263cc7
       c0345f4c 00000000 00007d00 00000000 00000200 c0345f8c c0345f98 c03fbac0
Call Trace:
 [<c01f107a>] kick_pending_request_queues+0x1e/0x33
 [<c01f1aa3>] watch_for_status+0xed/0x135
 [<c01ef665>] xenwatch_thread+0x10e/0x133
 [<c01317f2>] autoremove_wake_function+0x0/0x57
 [<c01317f2>] autoremove_wake_function+0x0/0x57
 [<c01ef557>] xenwatch_thread+0x0/0x133
 [<c0131324>] kthread+0xba/0xf0
 [<c013126a>] kthread+0x0/0xf0
 [<c0107911>] kernel_thread_helper+0x5/0xb
Code: d2 75 01 c3 89 44 24 04 8b 48 60 ff e1 8b 44 24 04 8b 48 60 ff e1 81 44 
24 04 a0 00 00 00 e9 95 24 00 00 53 83 ec 04 8b 5c 24 0c <f0> 0f ba b3 04 01 
00 00 02 f0 0f ba ab 04 01 00 00 06 19 c0 85
 <6>IP: routing cache hash table of 512 buckets, 4Kbytes
TCP established hash table entries: 4096 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
NET: Registered protocol family 1
NET: Registered protocol family 17
VFS: Cannot open root device "sda1" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

Ian P. Christian ~ http://pookey.co.uk

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