[Xen-bugs] [Bug 673] New: kernel BUG at arch/i386/mm/pgtable-xen

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=673

           Summary: kernel BUG at arch/i386/mm/pgtable-xen.c:306 (sometimes
                    causing a Panic)
           Product: Xen
           Version: 3.0.2
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Guest-OS
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: list@xxxxxxxxxx


My setup was:
I'm running a SMP machine (2 Opteron) with 6G of ram. No special parameters
where set for the memory of dom0, so it took it all. Everything woked fine with
one or two small domUs. Then I startet a domU that was supposet to take 5G of
ram. (btw: I to start that domU twice, because dom0 didn't balloon fast
enough).

Now some bug claiming to be at arch/i386/mm/pgtable-xen.c:306 started to kick
in in dom0. It caused some processes to terminate (especially it logged me off)
and one time I even got a kernel-panic. The problem didn't reappear after I
limited the memory of dom0 to 300M.

Kernelversion is a xenified 2.6.16.20 from kernel.org.
xen is 3.0.2 with pae-Support
Distribution is a Ubuntu 6.06

Here comes some of the stuff I found in kern.log

Jun 11 15:09:02 cipx1 kernel: [  204.080696] ------------[ cut here
]------------
Jun 11 15:09:02 cipx1 kernel: [  204.080795] kernel BUG at
arch/i386/mm/pgtable-xen.c:306!
Jun 11 15:09:02 cipx1 kernel: [  204.080891] invalid opcode: 0000 [#1]
Jun 11 15:09:02 cipx1 kernel: [  204.080982] SMP 
Jun 11 15:09:02 cipx1 kernel: [  204.081202] Modules linked in: xt_physdev
iptable_filter ip_tables x_tables af_packet bridge ipv6 video containe
r button battery ac md_mod parport_pc lp parport tsdev floppy tg3 serial_core
pcspkr psmouse rtc serio_raw shpchp pci_hotplug sworks_agp agpgart 
evdev sg dm_mod ide_generic ehci_hcd ohci_hcd usbcore aic79xx
scsi_transport_spi ide_cd cdrom serverworks generic sd_mod 3w_xxxx scsi_mod
thermal
 fan freq_table processor
Jun 11 15:09:02 cipx1 kernel: [  204.084698] CPU:    0
Jun 11 15:09:02 cipx1 kernel: [  204.084699] EIP:    0061:[<c0112ed0>]    Not
tainted VLI
Jun 11 15:09:02 cipx1 kernel: [  204.084700] EFLAGS: 00010282  
(2.6.16.20-xen-cip3 #1) 
Jun 11 15:09:02 cipx1 kernel: [  204.084981] EIP is at pgd_ctor+0x30/0x40
Jun 11 15:09:02 cipx1 kernel: [  204.085074] eax: fffffff4   ebx: d30bd800  
ecx: 00000001   edx: 00000000
Jun 11 15:09:02 cipx1 kernel: [  204.085173] esi: 00000000   edi: 00000000  
ebp: d30bd81c   esp: ececbe30
Jun 11 15:09:02 cipx1 kernel: [  204.085272] ds: 007b   es: 007b   ss: 0069
Jun 11 15:09:02 cipx1 kernel: [  204.085366] Process bash (pid: 4782,
threadinfo=ececa000 task=c10fc560)
Jun 11 15:09:02 cipx1 kernel: [  204.085448] Stack: <0>d3add000 00000000
00000020 c0163f23 d3adc000 c1882ec0 00000001 000000d0 
Jun 11 15:09:02 cipx1 kernel: [  204.086312]        c1880f2c 000000d0 c1882ec0
ed7fa200 c1880f00 010000d0 c1880f00 ececa000 
Jun 11 15:09:02 cipx1 kernel: [  204.087094]        00000001 00000f80 d3add000
ed29aac0 00000000 ed29ac68 ed563030 c01639f7 
Jun 11 15:09:02 cipx1 kernel: [  204.087874] Call Trace:
Jun 11 15:09:02 cipx1 kernel: [  204.088033]  [<c0163f23>]
cache_alloc_refill+0x523/0x560
Jun 11 15:09:02 cipx1 kernel: [  204.088352]  [<c01639f7>]
kmem_cache_alloc+0x77/0x80
Jun 11 15:09:02 cipx1 kernel: [  204.088648]  [<c011364c>] pgd_alloc+0x1c/0x390
Jun 11 15:09:02 cipx1 kernel: [  204.088955]  [<c011c3ff>] mm_init+0x9f/0xd0
Jun 11 15:09:02 cipx1 kernel: [  204.089253]  [<c011d2c7>]
copy_process+0x6b7/0x1240
Jun 11 15:09:02 cipx1 kernel: [  204.089564]  [<c01664dc>] fd_install+0x2c/0x60
Jun 11 15:09:02 cipx1 kernel: [  204.089870]  [<c011dec0>] do_fork+0x70/0x200
Jun 11 15:09:02 cipx1 kernel: [  204.090177]  [<c0102e87>] sys_fork+0x37/0x40
Jun 11 15:09:02 cipx1 kernel: [  204.090475]  [<c0105181>] syscall_call+0x7/0xb
Jun 11 15:09:02 cipx1 kernel: [  204.090787] Code: 04 54 43 c0 00 74 04 83 c4
0c c3 8b 44 24 10 c7 44 24 08 20 00 00 00 c7 44 24 04 00 00 00 00 8
9 04 24 e8 54 3c 00 00 85 c0 74 dc <0f> 0b 32 01 47 1b 3a c0 83 c4 0c c3 8d 74
26 00 55 57 56 53 83 

Jun 11 15:09:14 cipx1 kernel: [  204.095238]  <0>------------[ cut here
]------------
Jun 11 15:09:14 cipx1 kernel: [  215.579768] kernel BUG at
arch/i386/mm/pgtable-xen.c:306!
Jun 11 15:09:14 cipx1 kernel: [  215.579866] invalid opcode: 0000 [#2]
Jun 11 15:09:14 cipx1 kernel: [  215.579958] SMP 
Jun 11 15:09:14 cipx1 kernel: [  215.580181] Modules linked in: xt_physdev
iptable_filter ip_tables x_tables af_packet bridge ipv6 video containe
r button battery ac md_mod parport_pc lp parport tsdev floppy tg3 serial_core
pcspkr psmouse rtc serio_raw shpchp pci_hotplug sworks_agp agpgart 
evdev sg dm_mod ide_generic ehci_hcd ohci_hcd usbcore aic79xx
scsi_transport_spi ide_cd cdrom serverworks generic sd_mod 3w_xxxx scsi_mod
thermal
 fan freq_table processor
Jun 11 15:09:14 cipx1 kernel: [  215.585350] CPU:    0
Jun 11 15:09:14 cipx1 kernel: [  215.585351] EIP:    0061:[<c0112ed0>]    Not
tainted VLI
Jun 11 15:09:14 cipx1 kernel: [  215.585352] EFLAGS: 00010282  
(2.6.16.20-xen-cip3 #1) 
Jun 11 15:09:14 cipx1 kernel: [  215.585635] EIP is at pgd_ctor+0x30/0x40
Jun 11 15:09:14 cipx1 kernel: [  215.585729] eax: fffffff4   ebx: d30bd680  
ecx: 00000001   edx: 00000000
Jun 11 15:09:14 cipx1 kernel: [  215.585830] esi: 00000000   edi: 00000000  
ebp: d30bd69c   esp: ecf67e30
Jun 11 15:09:14 cipx1 kernel: [  215.585930] ds: 007b   es: 007b   ss: 0069
Jun 11 15:09:14 cipx1 kernel: [  215.586024] Process bash (pid: 4773,
threadinfo=ecf66000 task=c8db8030)
Jun 11 15:09:14 cipx1 kernel: [  215.586107] Stack: <0>d302c000 00000000
00000020 c0163f23 d302b000 c1882ec0 00000001 000000d0 
Jun 11 15:09:14 cipx1 kernel: [  215.586978]        c1880f2c 000000d0 c1882ec0
ed7fa200 c1880f00 010000d0 c1880f00 ecf66000 
Jun 11 15:09:14 cipx1 kernel: [  215.587763]        00000001 00000f80 d302c000
ed166740 00000000 ed1668e8 ed54d030 c01639f7 
Jun 11 15:09:14 cipx1 kernel: [  215.588550] Call Trace:
Jun 11 15:09:14 cipx1 kernel: [  215.588711]  [<c0163f23>]
cache_alloc_refill+0x523/0x560
Jun 11 15:09:14 cipx1 kernel: [  215.589132]  [<c01639f7>]
kmem_cache_alloc+0x77/0x80
Jun 11 15:09:14 cipx1 kernel: [  215.589431]  [<c011364c>] pgd_alloc+0x1c/0x390
Jun 11 15:09:14 cipx1 kernel: [  215.589738]  [<c011c3ff>] mm_init+0x9f/0xd0
Jun 11 15:09:14 cipx1 kernel: [  215.590039]  [<c011d2c7>]
copy_process+0x6b7/0x1240
Jun 11 15:09:14 cipx1 kernel: [  215.590351]  [<c01664dc>] fd_install+0x2c/0x60
Jun 11 15:09:14 cipx1 kernel: [  215.590657]  [<c011dec0>] do_fork+0x70/0x200
Jun 11 15:09:14 cipx1 kernel: [  215.590966]  [<c0102e87>] sys_fork+0x37/0x40
Jun 11 15:09:14 cipx1 kernel: [  215.591267]  [<c0105181>] syscall_call+0x7/0xb
Jun 11 15:09:14 cipx1 kernel: [  215.591580] Code: 04 54 43 c0 00 74 04 83 c4
0c c3 8b 44 24 10 c7 44 24 08 20 00 00 00 c7 44 24 04 00 00 00 00 8
9 04 24 e8 54 3c 00 00 85 c0 74 dc <0f> 0b 32 01 47 1b 3a c0 83 c4 0c c3 8d 74
26 00 55 57 56 53 83 

Jun 11 15:11:22 cipx1 kernel: [  215.596065]  <0>------------[ cut here
]------------
Jun 11 15:11:22 cipx1 kernel: [  344.285360] kernel BUG at
arch/i386/mm/pgtable-xen.c:306!
<REBOOT, I guess that was the Panic>


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[Xen-bugs] [Bug 673] New: kernel BUG at arch/i386/mm/pgtable-xen.c:306 (
