[Xen-devel] kernel BUG at arch/i386/mm/hypervisor.c

["T. Eichstädt" <abc@xxxxxxxxxx>]

Hello All,

I have some problems with a 32 Bit DomU Guest under a 64 Bit Dom0: The 
DomU crashes randomly.
The problem only occurs on 32 Bit DomUs, not on 64 Bit DomUs.
I have CentOS 5.2 with a 2.6.18 distro kernel running on DomU and Dom0.

My problem seems to be the same as: 
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=756
Are there already any solutions ?

Kernel output and xm dmesg are attached.

Best regards
 Thimo Eichstädt

---domuU kernel crash: --------------
kernel BUG at arch/i386/mm/hypervisor.c:197!
invalid opcode: 0000 [#1]
SMP
last sysfs file: /block/ram0/range
Modules linked in: ipv6 i2c_dev i2c_core sunrpc xennet ztdummy(U) 
zaptel(U) oslec(U) crc_ccitt fcpci(U) capi capifs kernelcapi dm_mirror 
dm_multipath dm_mod parport_pc lp parport pcspkr xenblk ext3 jbd 
ehci_hcd ohci_hcd uhci_hcd
CPU:    0
EIP:    0061:[<c04151ae>]    Tainted: PF     VLI
EFLAGS: 00010282   (2.6.18-53.1.4.el5xen #1)
EIP is at xen_pgd_pin+0x43/0x51
eax: ffffffea   ebx: c0e9aef4   ecx: 00000001   edx: 00000000
esi: 00007ff0   edi: 00000000   ebp: d4b81550   esp: c0e9aef4
ds: 007b   es: 007b   ss: 0069
Process crond (pid: 1594, ti=c0e9a000 task=c0ea8550 task.ti=c0e9a000)
Stack: 00000002 00078d59 00000000 00318460 00000000 c041230e c0700900 
c0412337
      c06f96a4 c041b793 c0e9afbc bfe34a24 01200011 00000000 d4b81550 
c0ea8550
      c0700900 c0700e40 c06f96b0 c06f96c4 c06f96c0 c0700900 00000001 
00000001
Call Trace:
[<c041230e>] __pgd_pin+0x2a/0x37
[<c0412337>] mm_pin+0x1c/0x23
[<c041b793>] copy_process+0xb63/0x1167
[<c041bdd8>] do_fork+0x41/0x130
[<c04031c1>] sys_clone+0x28/0x2d
[<c040534f>] syscall_call+0x7/0xb
=======================
Code: 75 0e a1 28 72 74 c0 8b 14 90 81 e2 ff ff ff 7f 89 54 24 04 89 e3 
b9 01 00 00 00 31 d2 be f0 7f 00 00 e8 96 c1 fe ff 85 c0 79 08 <0f> 0b 
c5 00 eb 82 61 c0 83 c4 0c 5b 5e c3 56 89 c2 53 83 ec 0c
EIP: [<c04151ae>] xen_pgd_pin+0x43/0x51 SS:ESP 0069:c0e9aef4
<0>Kernel panic - not syncing: Fatal exception


--------------- xm dmesg -------------
....
(XEN) mm.c:1904:d10 Dom 10 cannot set foreign dom <-- this is the 32 Bit 
domain
(XEN) mm.c:1904:d10 Dom 10 cannot set foreign dom
(XEN) mm.c:1904:d10 Dom 10 cannot set foreign dom
(XEN) mm.c:1904:d10 Dom 10 cannot set foreign dom
(XEN) mm.c:1904:d10 Dom 10 cannot set foreign dom
(XEN) mm.c:1904:d10 Dom 10 cannot set foreign dom
(XEN) mm.c:1904:d10 Dom 10 cannot set foreign dom
(XEN) mm.c:1904:d10 Dom 10 cannot set foreign dom
(XEN) mm.c:1752:d10 Bad type (saw 00000000e8000001 != exp 
0000000020000000) for mfn 958d2 (pfn 8454)
(XEN) mm.c:644:d10 Attempt to create linear p.t. with write perms
(XEN) mm.c:1069:d10 Failure in alloc_l2_table: entry 7
(XEN) mm.c:1773:d10 Error while validating mfn bd54a (pfn 19b1b) for 
type 0000000040000000: caf=80000003 taf=0000000040000001
(XEN) mm.c:1143:d10 Failure in alloc_l3_table: entry 0
(XEN) mm.c:1773:d10 Error while validating mfn 78d59 (pfn 18c23) for 
type 0000000060000000: caf=80000003 taf=0000000060000001
(XEN) mm.c:2042:d10 Error while pinning mfn 78d59


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