[Xen-devel] Re: crash with Xen dom0 image from kdump

[Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>]

Hi, Kazuo

Great!
I'll try to use your tool and Horms patch.

Best Regards,

Akio Takebe

>Hi,
>
>I tried to use crash (http://people.redhat.com/~anderson/) with 
>x86_32 xen domain0 image, which is extracted from whole-machine dump
>image made by kexec/kdump.
>
>'kmem -i' cause some error, but other almost all commands I tried seem
>to work well.
>This may be some helps for xen development and troubleshooting.
>
>regards,
>
>---------------------------------------------------------------------------
>(... get vmcore with kexec/kdump ...)
>$ ./dom0cut_x86_32.py -txen -f -dvmcore -odom0core -xxen-syms -vvmlinux-2.6
>.16
>$ crash vmlinux dom0core
>
>crash 4.0-2.24
>Copyright (C) 2002, 2003, 2004, 2005, 2006  Red Hat, Inc.
>Copyright (C) 2004, 2005, 2006  IBM Corporation
>Copyright (C) 1999-2006  Hewlett-Packard Co
>Copyright (C) 2005  Fujitsu Limited
>Copyright (C) 2005  NEC Corporation
>Copyright (C) 1999, 2002  Silicon Graphics, Inc.
>Copyright (C) 1999, 2000, 2001, 2002  Mission Critical Linux, Inc.
>This program is free software, covered by the GNU General Public License,
>and you are welcome to change it and/or distribute copies of it under
>certain conditions.  Enter "help copying" to see the conditions.
>This program has absolutely no warranty.  Enter "help warranty" for details.
> 
>GNU gdb 6.1
>Copyright 2004 Free Software Foundation, Inc.
>GDB is free software, covered by the GNU General Public License, and you are
>welcome to change it and/or distribute copies of it under certain conditions.
>Type "show copying" to see the conditions.
>There is absolutely no warranty for GDB.  Type "show warranty" for details.
>This GDB was configured as "i686-pc-linux-gnu"...
>
>
>      KERNEL: vmlinux                           
>    DUMPFILE: dom0core
>        CPUS: 2
>        DATE: Wed May 24 18:52:04 2006
>      UPTIME: 00:04:32
>LOAD AVERAGE: 0.46, 0.10, 0.03
>       TASKS: 26
>    NODENAME: (none)
>     RELEASE: 2.6.16.13-xen
>     VERSION: #3 SMP Wed May 24 10:08:29 JST 2006
>     MACHINE: i686  (866 Mhz)
>      MEMORY: 887.4 MB
>       PANIC: "SysRq : Trigger a crashdump"
>         PID: 163
>     COMMAND: "echo"
>        TASK: c024e050  [THREAD_INFO: f3f0e000]
>         CPU: 0
>       STATE: TASK_RUNNING (SYSRQ)
>
>crash> bt
>PID: 163    TASK: c024e050  CPU: 0   COMMAND: "echo"
> #0 [f3f0ffbc] ret_from_fork at c01050a8
> #1 [f3f0ffb8] system_call at c01051d2
>    EAX: 00000004  EBX: 00000001  ECX: b7e8c000  EDX: 00000002 
>    DS:  007b      ESI: 00000002  ES:  007b      EDI: 00000000 
>    SS:  007b      ESP: bf8ad750  EBP: bf8ad774 
>    CS:  0073      EIP: b7f35a88  ERR: 00000004  EFLAGS: 00000246 
>crash> kmem -i
>              PAGES        TOTAL      PERCENTAGE
> TOTAL MEM   225145     879.5 MB         ----
>      FREE   216192     844.5 MB   96% of TOTAL MEM
>      USED     8953        35 MB    3% of TOTAL MEM
>    SHARED   216640     846.2 MB   96% of TOTAL MEM
>kmem: invalid kernel virtual address: 0  type: "inode buffer"
>---------------------------------------------------------------------------
>-- 
>Kazuo Moriwaka <moriwaka@xxxxxxxxxxxxx>

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