Re: [Xen-devel] XENFEAT_writable_pagetables vs VMASST_TYPE_writable_pagetables

["Jacob Gorm Hansen" <jacobg@xxxxxxx>]

On 5/31/06, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:

> I'll need to see a backtrace, or at least the particular error message
> from Xen.
It is here:

(XEN) DOM66: (file=mm.c, line=1522) Bad type (saw f0000001 != exp
20200000) for mfn e41 (pfn 75a)
(XEN) DOM66: (file=mm.c, line=428) Attempt to create linear p.t. with
write perms
(XEN) DOM66: (file=mm.c, line=868) Failure in alloc_l2_table: entry 32
(XEN) DOM66: (file=mm.c, line=1567) Error while validating mfn e40
(pfn 75b) for type 40000000: caf=80000003 taf=40000001
<0>------------[ cut here ]------------
<0>kernel BUG at arch/i386/mm/hypervisor.c:74!
<0>invalid opcode: 0000 [#1]
Modules linked in:
<0>CPU:    0
EIP:    0061:[<c010dcc5>]    Not tainted VLI
EFLAGS: 00010282   (2.6.16-xen #438)
<0>EIP is at xen_l2_entry_update+0x6a/0x8e
<0>eax: ffffffea   ebx: c0c5beb0   ecx: 00000001   edx: 00000000
<0>esi: 00007ff0   edi: 0000075b   ebp: 08151000   esp: c0c5beb0
<0>ds: 007b   es: 007b   ss: 0069
<0>Process find (pid: 19, threadinfo=c0c5a000 task=c0c58a30)
<0>Stack: <0>00e40080 00000000 00000000 00000000 0000eb40 08000000
bfc00000 c013184b
<0>       c075b080 00000000 c075b080 08151000 c0003000 c021fa98
08150fff c0c4a124
<0>       c0c4a124 c0c4a124 08048000 c013195a c0c5bf58 08048000
08151000 00000000
<0>Call Trace:
<0> [<c013184b>] free_pgd_range+0xed/0x19c
<0> [<c013195a>] free_pgtables+0x60/0x6c
<0> [<c0134c39>] exit_mmap+0x6c/0xb8
<0> [<c0110285>] mmput+0x1c/0x51
<0> [<c0112da8>] exit_mm+0xe7/0xec
<0> [<c0113810>] do_exit+0x173/0x642
<0> [<c0113d54>] sys_exit_group+0x0/0x11
<0> [<c0104345>] syscall_call+0x7/0xb
<0>Code: be f0 7f 00 00 89 04 24 8b 44 24 24 31 d2 c7 44 24 04 00 00
00 00 c7 44 24 0c 00 00 00 00 89 44 24 08 e8 5f 33 ff ff 85 c0 79 08
<0f> 0b 4a 00 df 85 1c c0 a1 f0 19 23 c0 85 c0 74 0c 83 38 00 74

Thanks,
Jacob

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