Re: [Xen-devel] (XEN) mm.c:707:d49 Error getting mfn 2fef3 (pfn 6aef3)from L1 entry

["Andrew Lyon" <andrew.lyon@xxxxxxxxx>]

On Mon, Dec 1, 2008 at 9:07 AM, Jan Beulich <jbeulich@xxxxxxxxxx> wrote:
> That's a kernel side bug in that a type incorrectness slipped in during the
> 2.6.27 merge. It's already fixed in our local trees, and expected to make
> it into RC2). The only workaround I know of is to prevent Xen from using
> any memory above 4G (i.e. use mem=4G on the Xen command line).

Can you not post the patch/fix?

>
> As to associating the register dump and call trace with the source - you'd
> want to disassemble vmlinux, associate the reported rIP with an address
> in the disassembly, and then work yourself up the stack and/or associate
> assembly code with source code.
>
> Jan
>
>>>> "Andrew Lyon" <andrew.lyon@xxxxxxxxx> 30.11.08 20:47 >>>
> Hi,
>
> Can anybody advise me how to debug this crash? it happens when I try to start
> a 32 bit kernel on my 64 bit Xen system, the kernel is my own using
> opensuse 11.1
> rc1 2.6.27.7 xen patches, the kernel works as 32 and 64 bit dom0, and
> as 64 bit domU PV, is there a technique to find out where in the
> kernel
> source the crash happens? i.e what line in the source code?
>
> (XEN) mm.c:707:d49 Error getting mfn 2fef3 (pfn 6aef3) from L1 entry
> 000000002fef3061 for dom49
> (XEN) traps.c:437:d49 Unhandled invalid opcode fault/trap [#6] on VCPU
> 0 [ec=0000]
> (XEN) domain_crash_sync called from entry.S
> (XEN) Domain 49 (vcpu#0) crashed on cpu#7:
> (XEN) ----[ Xen-3.3.0  x86_64  debug=n  Not tainted ]----
> (XEN) CPU:    7
> (XEN) RIP:    e019:[<00000000c0212033>]
> (XEN) RFLAGS: 0000000000000282   EM: 1   CONTEXT: pv guest
> (XEN) rax: 00000000ffffffea   rbx: 00000000f56fb000   rcx: 000000002fef3061
> (XEN) rdx: 0000000000000000   rsi: 0000000000000006   rdi: 0000000000000000
> (XEN) rbp: 000000000002fef3   rsp: 00000000c047df54   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 000000008005003b   cr4: 00000000000026b0
> (XEN) cr3: 000000022feeb000   cr2: 0000000000000000
> (XEN) ds: e021   es: e021   fs: e021   gs: 0000   ss: e021   cs: e019
> (XEN) Guest stack trace from esp=c047df54:
> (XEN)   c0212033 0001e019 00010082 00000000 00000061 00000000 c020fd81 
> 00104000
> (XEN)   f56fb000 00000000 000004ad 00000103 000012b4 c048afc6 00000061 
> 80000000
> (XEN)   004ad000 00000000 0061a027 00000000 00000000 c0445980 c0479640 
> c047dff4
> (XEN)   c048662f 00000000 0061f000 00000000 00000000 03040800 c0616000 
> 00000000
> (XEN)   00000000 03040800 c0616000 00000000 00000000 c04814fb c03b5000 
> c03f0102
> (XEN)   c0616000 03040800 00000000 c04813bc c04814c1 c04814c9 c04814d1 
> c0202408
> (XEN)   c020243b c02024dd c03a9bc8 c02027b4 c0202a79 c0202b4f c02032ef 
> c0203818
> (XEN)   c0203c97 c0204331 c0204344 c0204368 c0204375 c02043f7 c02046d4 
> c0205134
> (XEN)   c0205203 c0205d42 c0205d87 c0205ddd c0206013 c02060c8 c02069b8 
> c0487768
> (XEN)   c0487770 c0207bf0 c0207bfe c0207c6e c0207c7c c0488973 c0488986 
> c02080e3
> (XEN)   c020816d c0208e42 c020903e c0209068 c0209070 c0209289 c0209290 
> c0209dd8
> (XEN)   c0209e5f c0209e6e c0209ea1 c0209eab c0209ee6 c0209eee c0209ef6 
> c03abf44
> (XEN)   c03ac0ea c03ac145 c03ac165 c03ac319 c03ac3d9 c03ac814 c0488c62 
> c0488c6a
> (XEN)   c03acce5 c03acd47 c0488d8c c0488d94 c0488d9c c0488da4 c0488db2 
> c0488dba
> (XEN)   c0488dc8 c0488dd0 c03ace21 c03ace8a c03ad00c c03ad026 c03ad078 
> c03ad0d7
> (XEN)   c03ad0dc c03ad301 c03ad374 c03ad37f c03ad38d c03ad416 c03ad428 
> c03ad517
> (XEN)   c03ad522 c03ad527 c03ad6a1 c03ad8ad c03ada60 c03ada99 c03adaaa 
> c03adb00
> (XEN)   c03adb92 c03adb97 c03adba2 c03adc99 c03adcab c03adef7 c03adf5a 
> c03adfc6
> (XEN)   c03adfe7 c03ae0dc c03ae0e6 c03ae0f0 c03ae10a c03ae114 c03ae154 
> c020a842
> (XEN)   c020be0f c020bf56 c0489e4b c048a12d c020d76c c020e04e c020ff99 
> c020ffa0
> (XEN) mm.c:707:d50 Error getting mfn 3b5fb (pfn 5f9fb) from L1 entry
> 000000003b5fb061 for dom50
> (XEN) traps.c:437:d50 Unhandled invalid opcode fault/trap [#6] on VCPU
> 0 [ec=0000]
> (XEN) domain_crash_sync called from entry.S
> (XEN) Domain 50 (vcpu#0) crashed on cpu#2:
> (XEN) ----[ Xen-3.3.0  x86_64  debug=n  Not tainted ]----
> (XEN) CPU:    2
> (XEN) RIP:    e019:[<00000000c0212033>]
> (XEN) RFLAGS: 0000000000000282   EM: 1   CONTEXT: pv guest
> (XEN) rax: 00000000ffffffea   rbx: 00000000f56fb000   rcx: 000000003b5fb061
> (XEN) rdx: 0000000000000000   rsi: 0000000000000006   rdi: 0000000000000000
> (XEN) rbp: 000000000003b5fb   rsp: 00000000c047df54   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 000000008005003b   cr4: 00000000000026b0
> (XEN) cr3: 00000003f2d5c000   cr2: 0000000000000000
> (XEN) ds: e021   es: e021   fs: e021   gs: 0000   ss: e021   cs: e019
> (XEN) Guest stack trace from esp=c047df54:
> (XEN)   c0212033 0001e019 00010082 00000000 00000061 00000000 c020fd81 
> 00104000
> (XEN)   f56fb000 00000000 000004ad 00000103 000012b4 c048afc6 00000061 
> 80000000
> (XEN)   004ad000 00000000 0061a027 00000000 00000000 c0445980 c0479640 
> c047dff4
> (XEN)   c048662f 00000000 0061f000 00000000 00000000 06040800 c0616000 
> 00000000
> (XEN)   00000000 06040800 c0616000 00000000 00000000 c04814fb c03b5000 
> c03f0102
> (XEN)   c0616000 06040800 00000000 c04813bc c04814c1 c04814c9 c04814d1 
> c0202408
> (XEN)   c020243b c02024dd c03a9bc8 c02027b4 c0202a79 c0202b4f c02032ef 
> c0203818
> (XEN)   c0203c97 c0204331 c0204344 c0204368 c0204375 c02043f7 c02046d4 
> c0205134
> (XEN)   c0205203 c0205d42 c0205d87 c0205ddd c0206013 c02060c8 c02069b8 
> c0487768
> (XEN)   c0487770 c0207bf0 c0207bfe c0207c6e c0207c7c c0488973 c0488986 
> c02080e3
> (XEN)   c020816d c0208e42 c020903e c0209068 c0209070 c0209289 c0209290 
> c0209dd8
> (XEN)   c0209e5f c0209e6e c0209ea1 c0209eab c0209ee6 c0209eee c0209ef6 
> c03abf44
> (XEN)   c03ac0ea c03ac145 c03ac165 c03ac319 c03ac3d9 c03ac814 c0488c62 
> c0488c6a
> (XEN)   c03acce5 c03acd47 c0488d8c c0488d94 c0488d9c c0488da4 c0488db2 
> c0488dba
> (XEN)   c0488dc8 c0488dd0 c03ace21 c03ace8a c03ad00c c03ad026 c03ad078 
> c03ad0d7
> (XEN)   c03ad0dc c03ad301 c03ad374 c03ad37f c03ad38d c03ad416 c03ad428 
> c03ad517
> (XEN)   c03ad522 c03ad527 c03ad6a1 c03ad8ad c03ada60 c03ada99 c03adaaa 
> c03adb00
> (XEN)   c03adb92 c03adb97 c03adba2 c03adc99 c03adcab c03adef7 c03adf5a 
> c03adfc6
> (XEN)   c03adfe7 c03ae0dc c03ae0e6 c03ae0f0 c03ae10a c03ae114 c03ae154 
> c020a842
> (XEN)   c020be0f c020bf56 c0489e4b c048a12d c020d76c c020e04e c020ff99 
> c020ffa0
>
> Andy
>
> _______________________________________________
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> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>

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