Hi all,
I'm just beginning my LVM experiments. Had no trouble creating an LVM2 LV and
populating it with a file system. When I went to boot my shiny new filesystem
however I got an oops. I was going to repeat the exercise with another
loopback image and a duplicate of what was in the LVM LV, but the server
rebooted during a copy from /mnt/lvmlv to /mnt/loopback. Perhaps these are
connected?
I'll be happy to do straces etc, but I'll need specific instructions as I'm
not a programmer :o). Also, I don't yet have a serial cable for debugging, so
my information will surely be a little limited.
This is all with pristine kernel-2.6.8.1 Xen (bk pull as of yesterday) built
with make world. I'll try to repeat the experiment tomorrow with a loopback
device. I lost my partition table just now (my server had rebooted anyhow)
trying to get grub to work better (refused to give me the menu), so gpart's
doing it's scanning thing right now and I expect it's going to take hours :o(
Thanks all. I hope this isn't something obvious or stupid on my part (no pun
intended).
Paul
Here's my initial test xmdefconfig file:
# -*- mode: python; -*-
#============================================================================
# Python configuration setup for 'xm create'.
# This script sets the parameters used when a domain is created using 'xm
create'.
# You use a separate script for each domain you want to create, or
# you can set the parameters for the domain on the xm command line.
#============================================================================
#----------------------------------------------------------------------------
# Kernel image file.
kernel = "/boot/vmlinuz-2.6.8.1-xenU"
# Initial memory allocation (in megabytes) for the new domain.
memory = 256
# A name for your domain. All domains must have different names.
name = "domain1"
# Which CPU to start domain on?
#cpu = -1 # leave to Xen to pick
#----------------------------------------------------------------------------
# Define network interfaces.
# Number of network interfaces. Default is 1.
#nics=1
# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.
#vif = [ 'mac=aa:00:00:00:00:11, bridge=xen-br0' ]
#----------------------------------------------------------------------------
# Define the disk devices you want the domain to have access to, and
# what you want them accessible as.
# Each disk entry is of the form phy:UNAME,DEV,MODE
# where UNAME is the device, DEV is the device name the domain will see,
# and MODE is r for read-only, w for read-write.
disk = [ 'phy:xenvg/lv_test,sda1,w' ]
#,
# 'phy:xenvg/lv_test_swp,sda2,w' ] #for swap
#----------------------------------------------------------------------------
# Set the kernel command line for the new domain.
# You only need to define the IP parameters and hostname if the domain's
# IP config doesn't, e.g. in ifcfg-eth0 or via DHCP.
# You can use 'extra' to set the runlevel and custom environment
# variables used by custom rc scripts (e.g. VMID=, usr= ).
# Set if you want dhcp to allocate the IP address.
#dhcp="dhcp"
#ip = "10.10.10.4"
#netmask = "255.255.255.0"
#gateway = "10.10.10.1"
# Set netmask.
#netmask=
# Set default gateway.
#gateway=
# Set the hostname.
#hostname= "vm%d" % vmid
# Set root device.
root = "/dev/sda1 ro"
# Root device for nfs.
#root = "/dev/nfs"
# The nfs server.
#nfs_server = '169.254.1.0'
# Root directory on the nfs server.
#nfs_root = '/full/path/to/root/directory'
# Sets runlevel 4.
extra = "4"
#----------------------------------------------------------------------------
# Set according to whether you want the domain restarted when it exits.
# The default is 'onreboot', which restarts the domain when it shuts down
# with exit code reboot.
# Other values are 'always', and 'never'.
#restart = 'onreboot'
#============================================================================
And here's what I got when I tried to start it:
Xen1:~# xm create -c vmid=1
Using config file "/etc/xen/xmdefconfig".
Started domain domain1, console on port 9607
************ REMOTE CONSOLE: CTRL-] TO QUIT ********
Linux version 2.6.8.1-xenU (root@Xen1) (gcc version 3.3.4 (Debian
1:3.3.4-6sarge1)) #1 Fri Sep 24 10:43:11 NZST 2004
BIOS-provided physical RAM map:
Xen: 0000000000000000 - 0000000010000000 (usable)
256MB LOWMEM available.
DMI not present.
Built 1 zonelists
Kernel command line: ip=dhcp root=/dev/sda1 ro 4
Initializing CPU#0
PID hash table entries: 2048 (order 11: 16384 bytes)
Xen reported: 2791.047 MHz processor.
Using tsc for high-res timesource
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 256584k/262144k available (1507k kernel code, 5224k reserved,
452k data, 92k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay loop... 5570.56 BogoMIPS
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 512K
CPU: Intel(R) Xeon(TM) CPU 2.80GHz stepping 05
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... disabled
NET: Registered protocol family 16
Initializing Cryptographic API
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
Using anticipatory io scheduler
Initialising Xen virtual ethernet frontend driver.
Netfront recovered tx=0 rxfree=0
NET: Registered protocol family 2
IP: routing cache hash table of 2048 buckets, 16Kbytes
TCP: Hash tables configured (established 16384 bind 32768)
NET: Registered protocol family 1
NET: Registered protocol family 17
IP-Config: Guessing netmask 255.0.0.0
IP-Config: Complete:
device=eth0, addr=62.0.0.0, mask=255.0.0.0, gw=255.255.255.255,
host=62.0.0.0, domain=, nis-domain=(none),
bootserver=255.255.255.255, rootserver=255.255.255.255, rootpath=
ReiserFS: sda1: found reiserfs format "3.6" with standard journal
ReiserFS: sda1: using ordered data mode
ReiserFS: sda1: journal params: device sda1, size 8192, journal first
block 18, max trans len 1024, max batch 900, max commit age 30, max
trans age 30
ReiserFS: sda1: checking transaction log (sda1)
ReiserFS: sda1: Using r5 hash to sort names
VFS: Mounted root (reiserfs filesystem) readonly.
Freeing unused kernel memory: 92k freed
INIT: version 2.86 booting
Unable to handle kernel paging request at virtual address cfc00000
printing eip:
c0194ca1
*pde = ma 07c1c067 pa 0003f067
*pte = ma 00000000 pa 55555000
[<c0142ffe>] do_no_page+0x241/0x3ca
Oops: 0002 [#1]
PREEMPT
Modules linked in:
CPU: 0
EIP: 0061:[<c0194ca1>] Not tainted
EFLAGS: 00010202 (2.6.8.1-xenU)
EIP is at reiserfs_readdir+0x3c8/0x586
eax: 000100c4 ebx: ffffa5d4 ecx: 3ff37121 edx: cf8e1eb0
esi: cffb3721 edi: cfc00000 ebp: cfd5e0b4 esp: cf8e1e0c
ds: 0069 es: 0069 ss: 0069
Process rcS (pid: 51, threadinfo=cf8e0000 task=c1332c50)
Stack: cf8e1ed0 cf8e1ef0 00000001 d08bafb8 ffffffff 00000000 00000000 000ce510
cfc8f000 ffff0000 000100c4 20000000 00000000 d08bafb9 00000000 cf8e1eb0
cfc8f030 0000ce51 00000001 cfc92c5c cfd5fccc cfc92c5c 00000001 cfc8f030
Call Trace:
[<c0142ffe>] do_no_page+0x241/0x3ca
Code: f3 a5 f6 c3 02 74 02 66 a5 f6 c3 01 74 01 a4 8b 8c 24 6c 01
<1>Unable to handle kernel NULL pointer dereference at virtual
address 0000010f printing eip:
c0143e43
*pde = ma 00000000 pa 55555000
[<c0145c28>] exit_mmap+0x133/0x15b
[<c011a030>] mmput+0x66/0x8d
[<c011e2b7>] do_exit+0x150/0x41a
[<c010aaa0>] do_divide_error+0x0/0xfa
[<c0115627>] do_page_fault+0x226/0x641
[<c010db14>] page_fault+0x38/0x40
[<c0194ca1>] reiserfs_readdir+0x3c8/0x586
[<c0142ffe>] do_no_page+0x241/0x3ca
Oops: 0002 [#2]
PREEMPT
Modules linked in:
CPU: 0
EIP: 0061:[<c0143e43>] Not tainted
EFLAGS: 00010202 (2.6.8.1-xenU)
EIP is at __remove_shared_vm_struct+0x1b/0x5d
eax: ffffffff ebx: cfd77ba0 ecx: cfc8cb80 edx: cf8e45e4
esi: cfc8cb80 edi: cfd77ba0 ebp: 0000000b esp: cf8e1c78
ds: 0069 es: 0069 ss: 0069
Process rcS (pid: 51, threadinfo=cf8e0000 task=c1332c50)
Stack: cf8e0000 c0143ec0 cfd77ba0 cfc8cb80 cf8e45e4 cfd77bf4 cfd77ba0 cfd6e680
c0145c28 cfd77ba0 00000000 00000000 00000000 ffffffff cf8e1cbc 00000000
c03091ec 00000066 cfd6e680 cfd6e6a0 c1332c50 c011a030 cfd6e680 c030a40c
Call Trace:
[<c0143ec0>] remove_vm_struct+0x3b/0x97
[<c0145c28>] exit_mmap+0x133/0x15b
[<c011a030>] mmput+0x66/0x8d
[<c011e2b7>] do_exit+0x150/0x41a
[<c010aaa0>] do_divide_error+0x0/0xfa
[<c0115627>] do_page_fault+0x226/0x641
[<c010db14>] page_fault+0x38/0x40
[<c0194ca1>] reiserfs_readdir+0x3c8/0x586
[<c0142ffe>] do_no_page+0x241/0x3ca
Code: ff 80 10 01 00 00 8b 43 14 a8 08 74 07 83 6a 24 01 8b 43 14
<6>note: rcS[51] exited with preempt_count 2
Unable to handle kernel NULL pointer dereference at virtual address 000000e7
printing eip:
c015d0b6
*pde = ma 00000000 pa 55555000
[<c01635f7>] do_select+0x261/0x2c8
[<c01631f1>] __pollwait+0x0/0xc6
[<c0163933>] sys_select+0x2b0/0x4a8
[<c015051d>] sys_close+0x63/0x96
[<c010d7b7>] syscall_call+0x7/0xb
Oops: 0000 [#3]
PREEMPT
Modules linked in:
CPU: 0
EIP: 0061:[<c015d0b6>] Not tainted
EFLAGS: 00010246 (2.6.8.1-xenU)
EIP is at pipe_poll+0x1b/0x7c
eax: cf8efce4 ebx: ffffffff ecx: 00000000 edx: 00000000
esi: cfc8c680 edi: 0000000a ebp: 0000000a esp: cffa3edc
ds: 0069 es: 0069 ss: 0069
Process init (pid: 1, threadinfo=cffa2000 task=cffa1670)
Stack: cffa1670 00000000 cffa3f44 cfc8c680 00000400 c01635f7 cfc8c680 00000000
00000000 00000000 00000400 00000000 00000000 00000000 00000145 00000400
cffa2000 cfc70d4c cfc70d48 cfc70d44 cfc70d54 cfc70d50 cfc70d4c 000001ec
Call Trace:
[<c01635f7>] do_select+0x261/0x2c8
[<c01631f1>] __pollwait+0x0/0xc6
[<c0163933>] sys_select+0x2b0/0x4a8
[<c015051d>] sys_close+0x63/0x96
[<c010d7b7>] syscall_call+0x7/0xb
Code: 8b 8b e8 00 00 00 74 17 85 c9 74 13 89 4c 24 04 89 54 24 08
<0>Kernel panic: Attempted to kill init!
<1>Unable to handle kernel NULL pointer dereference at virtual
address 00000004 printing eip:
c013be54
*pde = ma 00000000 pa 55555000
[<c013c683>] drain_array+0x7c/0xb0
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