[Xen-users] Seg fixup errors + kernellockdep.c and alternative crash

[Mael <mhumbert@xxxxxxxxxxxxxx>]

Hi, the current problem appears when launching any of the Xen VMS : 

First problem (appears all the time when starting a VM) :

4gp seg fixup, process init (pid1), cs:ip 73:002b2b0d
4gp seg fixup, process init (pid1), cs:ip 73:0017fe67
...

Second problem (appears randomly) : 

BUG: at kernel/lockdep.c:1858 trace_hardirqs_on()
[<c1005D9E] show_trace_log_lvl+0x1a/0x2f
[<c10006347>] show_trace+0x12/0x14
[<c100063c2>] dump_stack+0x16/0x18
[<c1037435>] trace_hardirqs_on+0xc4/0x143
[<c10055d4>] restore_all+0x3b/0x3e

Third problem (appears randomly when launching machine) : 
Kernel panic - not syncing: Attempted to kill init!


Example of a log file : 
Linux version 2.6.20-2925.9.fc7xen
(kojibuilder@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc version 4.1.2 20070502
(Red Hat 4.1.2-12)) #1 SMP Tue May 22 08:53:03 EDT 2007
BIOS-provided physical RAM map:
sanitize start
sanitize bail 0
copy_e820_map() start: 0000000000000000 size: 000000001fc00000 end:
000000001fc00000 type: 1
 Xen: 0000000000000000 - 000000001fc00000 (usable)
0MB HIGHMEM available.
508MB LOWMEM available.
NX (Execute Disable) protection: active
Entering add_active_range(0, 0, 130048) 0 entries of 256 used
Zone PFN ranges:
  DMA             0 ->   130048
  Normal     130048 ->   130048
  HighMem    130048 ->   130048
early_node_map[1] active PFN ranges
    0:        0 ->   130048
On node 0 totalpages: 130048
  DMA zone: 1016 pages used for memmap
  DMA zone: 0 pages reserved
  DMA zone: 129032 pages, LIFO batch:31
  Normal zone: 0 pages used for memmap
  HighMem zone: 0 pages used for memmap
ACPI in unprivileged domain disabled
Built 1 zonelists.  Total pages: 129032
Kernel command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
CPU 0 irqstacks, hard=c135f000 soft=c133f000
PID hash table entries: 2048 (order: 11, 8192 bytes)
Xen reported: 1994.995 MHz processor.
Console: colour dummy device 80x25
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:    8
... MAX_LOCK_DEPTH:          30
... MAX_LOCKDEP_KEYS:        2048
... CLASSHASH_SIZE:           1024
... MAX_LOCKDEP_ENTRIES:     8192
... MAX_LOCKDEP_CHAINS:      16384
... CHAINHASH_SIZE:          8192
 memory used by lock dependency info: 1064 kB
 per task-struct memory footprint: 1200 bytes
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Software IO TLB disabled
vmalloc area: e0800000-f4ffe000, maxmem 2d7fe000
Memory: 244480k/520192k available (2030k kernel code, 20488k reserved, 1079k
data, 180k init, 0k highmem)
virtual kernel memory layout:
    fixmap  : 0xf5315000 - 0xf57fe000   (5028 kB)
    pkmap   : 0xf5000000 - 0xf5200000   (2048 kB)
    vmalloc : 0xe0800000 - 0xf4ffe000   ( 327 MB)
    lowmem  : 0xc0000000 - 0xdfc00000   ( 508 MB)
      .init : 0xc130e000 - 0xc133b000   ( 180 kB)
      .data : 0xc11fb8b9 - 0xc1309714   (1079 kB)
      .text : 0xc1000000 - 0xc11fb8b9   (2030 kB)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 5015.19 BogoMIPS
(lpj=10030382)
Security Framework v1.0.0 initialized
SELinux:  Initializing.
SELinux:  Starting in permissive mode
selinux_register_security:  Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 512
CPU: After generic identify, caps: 0fe9c3f1 00100000 00000000 00000000
00000000 00000000 00000000
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 2048K
CPU: After all inits, caps: 0fe9c3f1 00100000 00000000 00003040 00000000
00000000 00000000
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 11k freed

(Don't appear usually this following bug : )

BUG: at kernel/fork.c:994 copy_process()
 [<c1005d9e>] show_trace_log_lvl+0x1a/0x2f
 [<c1006347>] show_trace+0x12/0x14
 [<c10063c2>] dump_stack+0x16/0x18
 [<c101d040>] copy_process+0x195/0x1245
 [<c101e140>] do_fork+0x50/0x117
 [<c1003351>] kernel_thread+0x8e/0x96
 [<c10023a4>] rest_init+0x14/0x28
 [<c130e88a>] start_kernel+0x3e2/0x3ea
 [<c1000079>] 0xc1000079
 =======================


Brought up 1 CPUs
sizeof(vma)=88 bytes
sizeof(page)=32 bytes
sizeof(inode)=564 bytes
sizeof(dentry)=156 bytes
sizeof(ext3inode)=800 bytes
sizeof(buffer_head)=56 bytes
sizeof(skbuff)=176 bytes
sizeof(task_struct)=2704 bytes
Grant table initialized
NET: Registered protocol family 16
Brought up 1 CPUs
PCI: Fatal: No config space access function found
PCI: setting up Xen PCI frontend stub
Setting up standard PCI resources
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
xen_mem: Initialising balloon driver.
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
PCI: System does not support PCI
PCI: System does not support PCI
NetLabel: Initializing
NetLabel:  domain hash size = 128
NetLabel:  protocols = UNLABELED CIPSOv4
NetLabel:  unlabeled traffic allowed by default
NET: Registered protocol family 2
IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
TCP established hash table entries: 16384 (order: 7, 524288 bytes)
TCP bind hash table entries: 8192 (order: 6, 262144 bytes)
TCP: Hash tables configured (established 16384 bind 8192)
TCP reno registered
checking if image is initramfs... it is
Freeing initrd memory: 8340k freed
IA-32 Microcode Update Driver: v1.14-xen <tigran@xxxxxxxxxxx>
audit: initializing netlink socket (disabled)
audit(1194269409.556:1): initialized
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
SELinux:  Registering netfilter hooks
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
rtc: IRQ 8 is not free.
Non-volatile memory driver v1.2
Linux agpgart interface v0.101 (c) Dave Jones
RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize
input: Macintosh mouse button emulation as /class/input/input0
Xen virtual console successfully installed as xvc0
Event-channel device installed.
Console: switching to colour frame buffer device 100x37
input: Xen Virtual Keyboard/Mouse as /class/input/input1
usbcore: registered new interface driver libusual
usbcore: registered new interface driver hiddev
usbcore: registered new interface driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
mice: PS/2 mouse device common for all mice
TCP bic registered
Initializing XFRM netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
Using IPI No-Shortcut mode
XENBUS: Device with no driver: device/vbd/51712
XENBUS: Device with no driver: device/vif/0
Freeing unused kernel memory: 180k freed
Write protecting the kernel read-only data: 762k

(Always appear the following : )

4gb seg fixup, process init (pid 1), cs:ip 73:002dbb0d
4gb seg fixup, process init (pid 1), cs:ip 73:00e06e67
4gb seg fixup, process init (pid 1), cs:ip 73:002d2710
4gb seg fixup, process init (pid 1), cs:ip 73:00349659
4gb seg fixup, process init (pid 1), cs:ip 73:002d5fdc
4gb seg fixup, process init (pid 1), cs:ip 73:002d5fea
4gb seg fixup, process init (pid 1), cs:ip 73:0032cd82
4gb seg fixup, process init (pid 1), cs:ip 73:002ceff1
4gb seg fixup, process init (pid 1), cs:ip 73:002d5fdc
4gb seg fixup, process init (pid 1), cs:ip 73:002d5fea
USB Universal Host Controller Interface driver v3.0
ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver

(Sometimes here appear : )

BUG: at kernel/lockdep.c:1858 trace_hardirqs_on()
[<c1005D9E] show_trace_log_lvl+0x1a/0x2f
[<c10006347>] show_trace+0x12/0x14
[<c100063c2>] dump_stack+0x16/0x18
[<c1037435>] trace_hardirqs_on+0xc4/0x143
[<c10055d4>] restore_all+0x3b/0x3e

Registering block device major 202
 xvda:<6>device-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised:
dm-devel@xxxxxxxxxx
 xvda1 xvda2
Kernel panic - not syncing: Attempted to kill init!


Messages sometimes don't appear in the same order.

If anyone has any help on this :
1 times on 4, the VM started is shut off after the symptomatic Kernel panic.
Sometimes, its starts again (on crash= restart), but sometimes not

The correct "hwcap 0 nosegneg" is set in /etc/ld.so.conf
I am using a single file to store each VM 
Using Fedora Core 7 with Xen 3.1 emulated with VMWare Workstation (5.5.2)
without VMWare tools

Thanks in advance

Best regards

Mael
-- 
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