> Hi guys,
>
> well, solved this one. Rather inelegant response to not enough RAM assigned
> to
> Dom-0. I was using 128MB. Upped it to 256MB and things seem to work okay
> (will this be enough?). Are any changes afoot to handle this situation
> better? Or is it more something for the Linux kernel folks to attend to?
The crash dump you sent was of the xenU getting unhappy perhaps
as a result of the reiserfs_readdir failing.
Did you get any messages in dom0 about allocation failures? Did
LVM initialise everything OK?
If you can get a serial line on the machine and boot with
console=ttyS0 we might find out why the dom 0 is exiting.
Ian
> Regards,
> Paul.
>
> On Tuesday 28 September 2004 04:04 pm, Paul Dorman wrote:
> > 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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