[Crash-utility] The problems when running SuSE 12 on VirtualBox
Dave Anderson
anderson at redhat.com
Wed Nov 18 15:00:12 UTC 2015
----- Original Message -----
> Hi Dave,
>
> So I try to execute "crash -d8 vmlinux-3.12.49-6-xen.gz" command:
>
> # crash -d8 vmlinux-3.12.49-6-xen.gz
Hello Nan,
Sorry, but I'm running out of ideas here. You could try uncompressing
the vmlinux-3.12.49-6-xen.gz file, but I'm guessing that it won't make
a difference.
Here is what the debug info shows:
You are using the correct file, because /proc/version matches the linux_banner
string in the vmlinux file, which it found using "/usr/bin/strings":
> /proc/version:
> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
> Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> /var/tmp/vmlinux-3.12.49-6-xen.gz_L3Bnwm:
> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
>Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
SUSE splits their vmlinux file into a stripped vmlinux-3.12.49-6-xen
file and an associated vmlinux-3.12.49-6-xen.debug file. That is
supported by the crash utility; vmlinux-3.12.49-6-xen.debug was
not found in the ./ (current) directory, nor in the ./.debug directory,
but it was found in the the /usr/lib/debug/boot directory:
> NOTE: gnu_debuglink file: vmlinux-3.12.49-6-xen.debug
> crc32: 82102e72
> GETBUF(25 -> 1)
> ./vmlinux-3.12.49-6-xen.debug: not readable/found
> ./.debug/vmlinux-3.12.49-6-xen.debug: not readable/found
> /usr/lib/debug/boot/vmlinux-3.12.49-6-xen.debug: CRC matches
So everything looks fine until it actually starting reading data
from /dev/mem.
Here it's trying to read the in-kernel configuration data, but it
is not started with MAGIC_START "IKCFG_ST" string:
> <readmem: ffffffff804d8ae0, KVADDR, "kernel_config_data", 32768, (ROE), 2de9ff0>
> <read_dev_mem: addr: ffffffff804d8ae0 paddr: 4d8ae0 cnt: 1312>
> <read_dev_mem: addr: ffffffff804d9000 paddr: 4d9000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804da000 paddr: 4da000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804db000 paddr: 4db000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804dc000 paddr: 4dc000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804dd000 paddr: 4dd000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804de000 paddr: 4de000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804df000 paddr: 4df000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804e0000 paddr: 4e0000 cnt: 2784>
> WARNING: could not find MAGIC_START!
Then it tries to read the cpu_xxxx_mask pointers, but it finds them
all equal to zero:
> <readmem: ffffffff804ce490, KVADDR, "cpu_possible_mask", 8, (FOE), 7ffc963725a8>
> <read_dev_mem: addr: ffffffff804ce490 paddr: 4ce490 cnt: 8>
> <readmem: ffffffff804ce480, KVADDR, "cpu_present_mask", 8, (FOE), 7ffc963725a8>
> <read_dev_mem: addr: ffffffff804ce480 paddr: 4ce480 cnt: 8>
> <readmem: ffffffff804ce488, KVADDR, "cpu_online_mask", 8, (FOE), 7ffc963725a8>
> <read_dev_mem: addr: ffffffff804ce488 paddr: 4ce488 cnt: 8>
> <readmem: ffffffff804ce478, KVADDR, "cpu_active_mask", 8, (FOE), 7ffc963725a8>
> <read_dev_mem: addr: ffffffff804ce478 paddr: 4ce478 cnt: 8>
I say that because if a virtual address was found in each location, it would
then read the mask at that location, and then the contents of the cpu_mask
would be translated. For example, this is what my laptop's output looks like,
where 8 cpus are possible, but 4 cpus exist:
<readmem: ffffffff81806d18, KVADDR, "cpu_possible_mask", 8, (FOE), 7fff70bec038>
<read_memory_device: addr: ffffffff81806d18 paddr: 1806d18 cnt: 8>
<readmem: ffffffff81ce0a20, KVADDR, "possible", 16, (ROE), f57620>
<read_memory_device: addr: ffffffff81ce0a20 paddr: 1ce0a20 cnt: 16>
cpu_possible_mask: 0 1 2 3 4 5 6 7
<readmem: ffffffff81806d08, KVADDR, "cpu_present_mask", 8, (FOE), 7fff70bec038>
<read_memory_device: addr: ffffffff81806d08 paddr: 1806d08 cnt: 8>
<readmem: ffffffff81ce0a30, KVADDR, "present", 16, (ROE), f57620>
<read_memory_device: addr: ffffffff81ce0a30 paddr: 1ce0a30 cnt: 16>
cpu_present_mask: 0 1 2 3
<readmem: ffffffff81806d10, KVADDR, "cpu_online_mask", 8, (FOE), 7fff70bec038>
<read_memory_device: addr: ffffffff81806d10 paddr: 1806d10 cnt: 8>
<readmem: ffffffff81ce0a10, KVADDR, "online", 16, (ROE), f57620>
<read_memory_device: addr: ffffffff81ce0a10 paddr: 1ce0a10 cnt: 16>
cpu_online_mask: 0 1 2 3
<readmem: ffffffff81806d00, KVADDR, "cpu_active_mask", 8, (FOE), 7fff70bec038>
<read_memory_device: addr: ffffffff81806d00 paddr: 1806d00 cnt: 8>
<readmem: ffffffff81ce0a40, KVADDR, "active", 16, (ROE), f57620>
<read_memory_device: addr: ffffffff81ce0a40 paddr: 1ce0a40 cnt: 16>
cpu_active_mask: 0 1 2 3
Later on it reads the system utsname structure and displays just
the kernel version from it, which should be "3.12.49-6-xen", but
obviously "0.8.0" is garbage:
> <readmem: ffffffff808647a4, KVADDR, "init_uts_ns", 390, (ROE), d1a0dc>
> <read_dev_mem: addr: ffffffff808647a4 paddr: 8647a4 cnt: 390>
> base kernel version: 0.8.0
Lastly, it tries to read the "linux_banner" string, but the WARNING
message actually means that it found no ASCII characters at that
location:
> <readmem: ffffffff804c80c0, KVADDR, "accessible check", 8, (ROE|Q),
> 7ffc9636f928>
> <read_dev_mem: addr: ffffffff804c80c0 paddr: 4c80c0 cnt: 8>
> <readmem: ffffffff804c80c0, KVADDR, "read_string characters", 1499,
> (ROE|Q), 7ffc9636fc80>
> <read_dev_mem: addr: ffffffff804c80c0 paddr: 4c80c0 cnt: 1499>
> WARNING: cannot read linux_banner string
> /proc/version:
> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
> Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> linux_banner:
>
At that point it just gives up:
> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_L3Bnwm and /dev/mem do not match!
So it looks like the virtual-to-physical address translation itself is
not working correctly. But I cannot speculate why it's failing.
Since Red Hat no longer supports Xen, support in the crash utility has been
maintained by patches posted by SUSE engineers and others on this mailing list.
Can anybody on this mailing list confirm that crash runs OK on Xen dom0
kernels of this vintage?
Dave
> crash 7.1.3
> Copyright (C) 2002-2014 Red Hat, Inc.
> Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
> Copyright (C) 1999-2006 Hewlett-Packard Co
> Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
> Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
> Copyright (C) 2005, 2011 NEC Corporation
> Copyright (C) 1999, 2002, 2007 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.
>
> get_live_memory_source: /dev/mem
> /proc/version:
> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
> Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> /var/tmp/vmlinux-3.12.49-6-xen.gz_L3Bnwm:
> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
> Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> readmem: read_dev_mem() -> /dev/mem
> GETBUF(32 -> 0)
> NOTE: gnu_debuglink file: vmlinux-3.12.49-6-xen.debug
> crc32: 82102e72
> GETBUF(25 -> 1)
> ./vmlinux-3.12.49-6-xen.debug: not readable/found
> ./.debug/vmlinux-3.12.49-6-xen.debug: not readable/found
> /usr/lib/debug/boot/vmlinux-3.12.49-6-xen.debug: CRC matches
> FREEBUF(1)
> FREEBUF(0)
> gdb /usr/lib/debug/boot/vmlinux-3.12.49-6-xen.debug
> GNU gdb (GDB) 7.6
> Copyright (C) 2013 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-unknown-linux-gnu"...
> GETBUF(248 -> 0)
> GETBUF(1500 -> 1)
>
> FREEBUF(1)
> FREEBUF(0)
> <readmem: ffffffff804d8ae0, KVADDR, "kernel_config_data", 32768, (ROE),
> 2de9ff0>
> <read_dev_mem: addr: ffffffff804d8ae0 paddr: 4d8ae0 cnt: 1312>
> <read_dev_mem: addr: ffffffff804d9000 paddr: 4d9000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804da000 paddr: 4da000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804db000 paddr: 4db000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804dc000 paddr: 4dc000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804dd000 paddr: 4dd000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804de000 paddr: 4de000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804df000 paddr: 4df000 cnt: 4096>
> <read_dev_mem: addr: ffffffff804e0000 paddr: 4e0000 cnt: 2784>
> WARNING: could not find MAGIC_START!
> GETBUF(248 -> 0)
> FREEBUF(0)
> GETBUF(64 -> 0)
> <readmem: ffffffff804ce490, KVADDR, "cpu_possible_mask", 8, (FOE),
> 7ffc963725a8>
> <read_dev_mem: addr: ffffffff804ce490 paddr: 4ce490 cnt: 8>
> <readmem: ffffffff804ce480, KVADDR, "cpu_present_mask", 8, (FOE),
> 7ffc963725a8>
> <read_dev_mem: addr: ffffffff804ce480 paddr: 4ce480 cnt: 8>
> <readmem: ffffffff804ce488, KVADDR, "cpu_online_mask", 8, (FOE),
> 7ffc963725a8>
> <read_dev_mem: addr: ffffffff804ce488 paddr: 4ce488 cnt: 8>
> <readmem: ffffffff804ce478, KVADDR, "cpu_active_mask", 8, (FOE),
> 7ffc963725a8>
> <read_dev_mem: addr: ffffffff804ce478 paddr: 4ce478 cnt: 8>
> FREEBUF(0)
> <readmem: ffffffff809b7548, KVADDR, "phys_to_machine_mapping", 8, (FOE),
> d2a2b8>
> <read_dev_mem: addr: ffffffff809b7548 paddr: 9b7548 cnt: 8>
> <readmem: ffffffff80a56588, KVADDR, "max_pfn", 8, (FOE), d2a2c0>
> <read_dev_mem: addr: ffffffff80a56588 paddr: a56588 cnt: 8>
> GETBUF(248 -> 0)
> FREEBUF(0)
> GETBUF(248 -> 0)
> FREEBUF(0)
> <readmem: ffffffff80a08e38, KVADDR, "timekeeper xtime_sec", 8, (ROE),
> 7ffc963725c8>
> <read_dev_mem: addr: ffffffff80a08e38 paddr: a08e38 cnt: 8>
> <readmem: ffffffff808647a4, KVADDR, "init_uts_ns", 390, (ROE), d1a0dc>
> <read_dev_mem: addr: ffffffff808647a4 paddr: 8647a4 cnt: 390>
> base kernel version: 0.8.0
> <readmem: ffffffff804c80c0, KVADDR, "accessible check", 8, (ROE|Q),
> 7ffc9636f928>
> <read_dev_mem: addr: ffffffff804c80c0 paddr: 4c80c0 cnt: 8>
> <readmem: ffffffff804c80c0, KVADDR, "read_string characters", 1499,
> (ROE|Q), 7ffc9636fc80>
> <read_dev_mem: addr: ffffffff804c80c0 paddr: 4c80c0 cnt: 1499>
> WARNING: cannot read linux_banner string
> /proc/version:
> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
> Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> linux_banner:
>
> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_L3Bnwm and /dev/mem do not match!
>
> Usage:
>
> crash [OPTION]... NAMELIST MEMORY-IMAGE[@ADDRESS] (dumpfile form)
> crash [OPTION]... [NAMELIST] (live system form)
>
> Enter "crash -h" for details.
>
>
>
>
> It is the same result. So does it mean my "vmlinux-3.12.49-6-xen.gz"
> isn't right file?
> Best Regards
> Nan Xiao
>
>
> On Tue, Nov 17, 2015 at 11:22 PM, Dave Anderson <anderson at redhat.com> wrote:
> >
> > If you simply enter "crash" on the command line in order to run live, a
> > search
> > is made for a kernel file that contains the /proc/version string, for
> > example:
> >
> > # cat /proc/version
> > Linux version 4.4.0-0.rc0.git9.1.fc23.x86_64
> > (root at hp-dl980g7-02.rhts.eng.bos.re
> > dhat.com) (gcc version 5.1.1 20150618 (Red Hat 5.1.1-4) (GCC) ) #1 SMP
> > Mon Nov 1
> > 6 14:32:21 EST 2015
> > #
> >
> > And when running on a live system in that manner, the "NAMELIST" kernel
> > file needs
> > to be uncompressed:
> >
> > $ man crash
> > CRASH(8)
> >
> > NAME
> > crash - Analyze Linux crash dump data or a live system
> >
> > SYNOPSIS
> > crash [OPTION]... NAMELIST MEMORY-IMAGE (dumpfile form)
> > crash [OPTION]... [NAMELIST] (live system form)
> >
> > ... [ cut ] ...
> >
> > OPTIONS
> > NAMELIST
> > This is a pathname to an uncompressed kernel image (a vmlinux
> > file), or
> > a Xen hypervisor image (a xen-syms file) which has been
> > compiled with
> > the "-g" option. If using the dumpfile form, a vmlinux file
> > may be
> > compressed in either gzip or bzip2 formats.
> > ...
> >
> >
> > And here it finds the uncompressed vmlinux in one of the search
> > directories,
> > in this case, in /usr/lib/debug/lib/modules/4.4.0-0.rc0.git9.1.fc23.x86_64:
> >
> > # crash
> >
> > crash 7.1.3
> > Copyright (C) 2002-2014 Red Hat, Inc.
> > Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
> > Copyright (C) 1999-2006 Hewlett-Packard Co
> > Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
> > Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
> > Copyright (C) 2005, 2011 NEC Corporation
> > Copyright (C) 1999, 2002, 2007 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 (GDB) 7.6
> > Copyright (C) 2013 Free Software Foundation, Inc.
> > License GPLv3+: GNU GPL version 3 or later
> > <http://gnu.org/licenses/gpl.html>
> > This is free software: you are free to change and redistribute it.
> > There is NO WARRANTY, to the extent permitted by law. Type "show
> > copying"
> > and "show warranty" for details.
> > This GDB was configured as "x86_64-unknown-linux-gnu"...
> >
> > KERNEL:
> > /usr/lib/debug/lib/modules/4.4.0-0.rc0.git9.1.fc23.x86_64/vmlinux
> > DUMPFILE: /dev/crash
> > CPUS: 160
> > DATE: Tue Nov 17 09:45:09 2015
> > UPTIME: 17:53:29
> > LOAD AVERAGE: 0.08, 0.03, 0.05
> > TASKS: 1714
> > NODENAME: hp-dl980g7-02.rhts.eng.bos.redhat.com
> > RELEASE: 4.4.0-0.rc0.git9.1.fc23.x86_64
> > VERSION: #1 SMP Mon Nov 16 14:32:21 EST 2015
> > MACHINE: x86_64 (2260 Mhz)
> > MEMORY: 1006 GB
> > PID: 7595
> > COMMAND: "crash"
> > TASK: ffff881f6f804700 [THREAD_INFO: ffff881f66888000]
> > CPU: 41
> > STATE: TASK_RUNNING (ACTIVE)
> >
> > crash>
> >
> > But if the vmlinux file is compressed:
> >
> > # cd /usr/lib/debug/lib/modules/4.4.0-0.rc0.git9.1.fc23.x86_64
> > # ls
> > vmlinux
> > # gzip vmlinux
> > # ls
> > vmlinux.gz
> > #
> >
> > It won't find it, and crash normally fails like so:
> >
> > # crash
> >
> > crash 7.1.3
> > Copyright (C) 2002-2014 Red Hat, Inc.
> > Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
> > Copyright (C) 1999-2006 Hewlett-Packard Co
> > Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
> > Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
> > Copyright (C) 2005, 2011 NEC Corporation
> > Copyright (C) 1999, 2002, 2007 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.
> >
> > crash: cannot find booted kernel -- please enter namelist argument
> >
> >
> > Usage:
> >
> > crash [OPTION]... NAMELIST MEMORY-IMAGE[@ADDRESS] (dumpfile form)
> > crash [OPTION]... [NAMELIST] (live system form)
> >
> > Enter "crash -h" for details.
> > #
> >
> > However, I can manually enter the compressed filename:
> >
> > # crash vmlinux.gz
> >
> > crash 7.1.3-1.fc23
> > Copyright (C) 2002-2014 Red Hat, Inc.
> > Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
> > Copyright (C) 1999-2006 Hewlett-Packard Co
> > Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
> > Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
> > Copyright (C) 2005, 2011 NEC Corporation
> > Copyright (C) 1999, 2002, 2007 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 (GDB) 7.6
> > Copyright (C) 2013 Free Software Foundation, Inc.
> > License GPLv3+: GNU GPL version 3 or later
> > <http://gnu.org/licenses/gpl.html>
> > This is free software: you are free to change and redistribute it.
> > There is NO WARRANTY, to the extent permitted by law. Type "show
> > copying"
> > and "show warranty" for details.
> > This GDB was configured as "x86_64-unknown-linux-gnu"...
> >
> > KERNEL: vmlinux.gz
> > DUMPFILE: /dev/crash
> > CPUS: 160
> > DATE: Tue Nov 17 10:11:42 2015
> > UPTIME: 18:20:02
> > LOAD AVERAGE: 0.16, 0.05, 0.06
> > TASKS: 1714
> > NODENAME: hp-dl980g7-02.rhts.eng.bos.redhat.com
> > RELEASE: 4.4.0-0.rc0.git9.1.fc23.x86_64
> > VERSION: #1 SMP Mon Nov 16 14:32:21 EST 2015
> > MACHINE: x86_64 (2260 Mhz)
> > MEMORY: 1006 GB
> > PID: 7660
> > COMMAND: "crash"
> > TASK: ffff881f66888c40 [THREAD_INFO: ffff881f6e998000]
> > CPU: 59
> > STATE: TASK_RUNNING (ACTIVE)
> >
> > crash>
> >
> > Dave
> >
> >
> > ----- Original Message -----
> >> Hi Dave,
> >>
> >> # crash -d8
> >>
> >> crash 7.1.3
> >> Copyright (C) 2002-2014 Red Hat, Inc.
> >> Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
> >> Copyright (C) 1999-2006 Hewlett-Packard Co
> >> Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
> >> Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
> >> Copyright (C) 2005, 2011 NEC Corporation
> >> Copyright (C) 1999, 2002, 2007 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.
> >>
> >>
> >> find_booted_kernel: search for [Linux version 3.12.49-6-xen
> >> (geeko at buildhost) (gcc version 4.8.5 (SUSE Linux) ) #1 SMP Mon Oct 26
> >> 16:05:37 UTC 2015 (11560c3)]
> >> mount_points[0]: / (1eeb2a0)
> >> mount_points[1]: /sys (1eeb2c0)
> >> mount_points[2]: /proc (1eeb2e0)
> >> mount_points[3]: /dev (1eeb300)
> >> mount_points[4]: /sys/kernel/security (1eeb320)
> >> mount_points[5]: /dev/shm (1eeb350)
> >> mount_points[6]: /dev/pts (1eeb370)
> >> mount_points[7]: /run (1eeb390)
> >> mount_points[8]: /sys/fs/cgroup (1eeb3b0)
> >> mount_points[9]: /sys/fs/cgroup/systemd (1eeb3e0)
> >> mount_points[10]: /sys/fs/pstore (1eeb420)
> >> mount_points[11]: /sys/fs/cgroup/cpuset (1eeb450)
> >> mount_points[12]: /sys/fs/cgroup/cpu,cpuacct (1eeb490)
> >> mount_points[13]: /sys/fs/cgroup/memory (1eeb4d0)
> >> mount_points[14]: /sys/fs/cgroup/devices (1eeb510)
> >> mount_points[15]: /sys/fs/cgroup/freezer (1eeb550)
> >> mount_points[16]: /sys/fs/cgroup/blkio (1eeb590)
> >> mount_points[17]: /sys/fs/cgroup/perf_event (1eeb5c0)
> >> mount_points[18]: / (1eeb600)
> >> mount_points[19]: /proc/sys/fs/binfmt_misc (1eeb620)
> >> mount_points[20]: /sys/kernel/debug (1eeb660)
> >> mount_points[21]: /dev/mqueue (1eeb690)
> >> mount_points[22]: /.snapshots (1eeb6b0)
> >> mount_points[23]: /var/spool (1eeb6d0)
> >> mount_points[24]: /var/opt (1eeb6f0)
> >> mount_points[25]: /var/log (1eeb710)
> >> mount_points[26]: /var/tmp (1eeb730)
> >> mount_points[27]: /var/lib/libvirt/images (1eeb750)
> >> mount_points[28]: /var/lib/mailman (1eeb790)
> >> mount_points[29]: /var/crash (1eeb7c0)
> >> mount_points[30]: /var/lib/pgsql (1eeb7e0)
> >> mount_points[31]: /var/lib/named (1eeb810)
> >> mount_points[32]: /var/lib/mariadb (1eeb840)
> >> mount_points[33]: /tmp (1eeb870)
> >> mount_points[34]: /usr/local (1eeb890)
> >> mount_points[35]: /srv (1eeb8b0)
> >> mount_points[36]: /boot/grub2/x86_64-efi (1eeb8d0)
> >> mount_points[37]: /opt (1eeb910)
> >> mount_points[38]: /boot/grub2/i386-pc (1eeb930)
> >> mount_points[39]: /home (1eeb960)
> >> mount_points[40]: /var/lib/xenstored (1eeb980)
> >> mount_points[41]: /run/user/0/gvfs (1eeb9b0)
> >> mount_points[42]: /run/media/root/SLE-12-SP1-Server-DVD-x86_643179
> >> (1eeb9e0)
> >> searchdirs[13]: /usr/lib/debug/lib/modules/3.12.49-6-xen/
> >> searchdirs[0]: /usr/src/linux/
> >> searchdirs[1]: /boot/
> >> searchdirs[2]: /boot/efi/redhat
> >> searchdirs[3]: /boot/efi/EFI/redhat
> >> searchdirs[4]: /
> >> searchdirs[5]: /usr/src/packages/
> >> searchdirs[6]: /usr/src/linux-3.12.49-6/
> >> searchdirs[7]: /usr/src/linux-3.12.49-6-obj/
> >> searchdirs[8]: /usr/src/linux-obj/
> >> searchdirs[9]: /usr/src/debug/
> >> searchdirs[10]: /lib/modules/3.12.49-6-xen/build/
> >> searchdirs[11]: /usr/src/redhat/BUILD/kernel-3.12.49/linux/
> >> searchdirs[12]: /usr/src/redhat/BUILD/kernel-3.12.49/linux-3.12.49/
> >> find_booted_kernel: check: /usr/src/linux/Makefile
> >> find_booted_kernel: check: /usr/src/linux/Kbuild
> >> find_booted_kernel: check: /usr/src/linux/Kconfig
> >> find_booted_kernel: check: /usr/src/linux/MAINTAINERS
> >> find_booted_kernel: check: /usr/src/linux/README.SUSE
> >> find_booted_kernel: check: /usr/src/linux/COPYING
> >> find_booted_kernel: check: /usr/src/linux/CREDITS
> >> find_booted_kernel: check: /usr/src/linux/README
> >> find_booted_kernel: check: /usr/src/linux/REPORTING-BUGS
> >> find_booted_kernel: check: /boot/boot.readme
> >> crash: /boot/symtypes-3.12.49-6-xen.gz: original filename unknown
> >> Use "-f /boot/symtypes-3.12.49-6-xen.gz" on command line to
> >> prevent this message.
> >>
> >> find_booted_kernel: check: /boot/symtypes-3.12.49-6-xen.gz
> >> crash: /boot/symtypes-3.12.49-6-default.gz: original filename unknown
> >> Use "-f /boot/symtypes-3.12.49-6-default.gz" on command line to
> >> prevent this message.
> >>
> >> find_booted_kernel: check: /boot/symtypes-3.12.49-6-default.gz
> >> crash: /boot/xen-4.5.1_10-1.gz: original filename unknown
> >> Use "-f /boot/xen-4.5.1_10-1.gz" on command line to prevent this
> >> message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-4.5.1_10-1.gz_Meuxmq: X86
> >>
> >> find_booted_kernel: check: /boot/xen-4.5.1_10-1.gz
> >> crash: /boot/xen-4.5.gz: original filename unknown
> >> Use "-f /boot/xen-4.5.gz" on command line to prevent this message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-4.5.gz_rsb8Dt: X86
> >>
> >> find_booted_kernel: check: /boot/xen-4.5.gz
> >> crash: /boot/xen-4.gz: original filename unknown
> >> Use "-f /boot/xen-4.gz" on command line to prevent this message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-4.gz_G4wt4w: X86
> >>
> >> find_booted_kernel: check: /boot/xen-4.gz
> >> crash: /boot/xen-dbg-4.5.1_10-1.gz: original filename unknown
> >> Use "-f /boot/xen-dbg-4.5.1_10-1.gz" on command line to prevent
> >> this message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-dbg-4.5.1_10-1.gz_Kh7vDA: X86
> >>
> >> find_booted_kernel: check: /boot/xen-dbg-4.5.1_10-1.gz
> >> crash: /boot/xen-dbg-4.5.gz: original filename unknown
> >> Use "-f /boot/xen-dbg-4.5.gz" on command line to prevent this
> >> message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-dbg-4.5.gz_Yc9ZkE: X86
> >>
> >> find_booted_kernel: check: /boot/xen-dbg-4.5.gz
> >> crash: /boot/xen-dbg-4.gz: original filename unknown
> >> Use "-f /boot/xen-dbg-4.gz" on command line to prevent this
> >> message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-dbg-4.gz_0JpLaI: X86
> >>
> >> find_booted_kernel: check: /boot/xen-dbg-4.gz
> >> crash: /boot/xen-dbg.gz: original filename unknown
> >> Use "-f /boot/xen-dbg.gz" on command line to prevent this message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-dbg.gz_XCKM8L: X86
> >>
> >> find_booted_kernel: check: /boot/xen-dbg.gz
> >> find_booted_kernel: check: /boot/xen-syms
> >> find_booted_kernel: check: /boot/xen-syms-4.5.1_10-1
> >> find_booted_kernel: check: /boot/xen-syms-dbg
> >> find_booted_kernel: check: /boot/xen-syms-dbg-4.5.1_10-1
> >> crash: /boot/xen.gz: original filename unknown
> >> Use "-f /boot/xen.gz" on command line to prevent this message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen.gz_3rstYS: X86
> >>
> >> find_booted_kernel: check: /boot/xen.gz
> >> find_booted_kernel: check: /boot/System.map-3.12.49-6-xen
> >> find_booted_kernel: check: /boot/config-3.12.49-6-xen
> >> crash: /boot/symvers-3.12.49-6-xen.gz: original filename unknown
> >> Use "-f /boot/symvers-3.12.49-6-xen.gz" on command line to
> >> prevent this message.
> >>
> >> find_booted_kernel: check: /boot/symvers-3.12.49-6-xen.gz
> >> find_booted_kernel: check: /boot/sysctl.conf-3.12.49-6-xen
> >> find_booted_kernel: check: /boot/vmlinux-3.12.49-6-xen.gz
> >> find_booted_kernel: found: /boot/vmlinux-3.12.49-6-xen.gz
> >> get_live_memory_source: /dev/mem
> >> /proc/version:
> >> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
> >> Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> >> /var/tmp/vmlinux-3.12.49-6-xen.gz_ecPt06:
> >> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
> >> Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> >> readmem: read_dev_mem() -> /dev/mem
> >> GETBUF(32 -> 0)
> >> NOTE: gnu_debuglink file: vmlinux-3.12.49-6-xen.debug
> >> crc32: 82102e72
> >> GETBUF(31 -> 1)
> >> /boot//vmlinux-3.12.49-6-xen.debug: not readable/found
> >> /boot//.debug/vmlinux-3.12.49-6-xen.debug: not readable/found
> >> /usr/lib/debug/boot/vmlinux-3.12.49-6-xen.debug: CRC matches
> >> FREEBUF(1)
> >> FREEBUF(0)
> >> gdb /usr/lib/debug/boot/vmlinux-3.12.49-6-xen.debug
> >> GNU gdb (GDB) 7.6
> >> Copyright (C) 2013 Free Software Foundation, Inc.
> >> License GPLv3+: GNU GPL version 3 or later
> >> <http://gnu.org/licenses/gpl.html>
> >> This is free software: you are free to change and redistribute it.
> >> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
> >> and "show warranty" for details.
> >> This GDB was configured as "x86_64-unknown-linux-gnu"...
> >> GETBUF(248 -> 0)
> >> GETBUF(1500 -> 1)
> >>
> >> FREEBUF(1)
> >> FREEBUF(0)
> >> <readmem: ffffffff804d8ae0, KVADDR, "kernel_config_data", 32768, (ROE),
> >> 2f22000>
> >> <read_dev_mem: addr: ffffffff804d8ae0 paddr: 4d8ae0 cnt: 1312>
> >> <read_dev_mem: addr: ffffffff804d9000 paddr: 4d9000 cnt: 4096>
> >> <read_dev_mem: addr: ffffffff804da000 paddr: 4da000 cnt: 4096>
> >> <read_dev_mem: addr: ffffffff804db000 paddr: 4db000 cnt: 4096>
> >> <read_dev_mem: addr: ffffffff804dc000 paddr: 4dc000 cnt: 4096>
> >> <read_dev_mem: addr: ffffffff804dd000 paddr: 4dd000 cnt: 4096>
> >> <read_dev_mem: addr: ffffffff804de000 paddr: 4de000 cnt: 4096>
> >> <read_dev_mem: addr: ffffffff804df000 paddr: 4df000 cnt: 4096>
> >> <read_dev_mem: addr: ffffffff804e0000 paddr: 4e0000 cnt: 2784>
> >> WARNING: could not find MAGIC_START!
> >> GETBUF(248 -> 0)
> >> FREEBUF(0)
> >> GETBUF(64 -> 0)
> >> <readmem: ffffffff804ce490, KVADDR, "cpu_possible_mask", 8, (FOE),
> >> 7fffb4ff6918>
> >> <read_dev_mem: addr: ffffffff804ce490 paddr: 4ce490 cnt: 8>
> >> <readmem: ffffffff804ce480, KVADDR, "cpu_present_mask", 8, (FOE),
> >> 7fffb4ff6918>
> >> <read_dev_mem: addr: ffffffff804ce480 paddr: 4ce480 cnt: 8>
> >> <readmem: ffffffff804ce488, KVADDR, "cpu_online_mask", 8, (FOE),
> >> 7fffb4ff6918>
> >> <read_dev_mem: addr: ffffffff804ce488 paddr: 4ce488 cnt: 8>
> >> <readmem: ffffffff804ce478, KVADDR, "cpu_active_mask", 8, (FOE),
> >> 7fffb4ff6918>
> >> <read_dev_mem: addr: ffffffff804ce478 paddr: 4ce478 cnt: 8>
> >> FREEBUF(0)
> >> <readmem: ffffffff809b7548, KVADDR, "phys_to_machine_mapping", 8, (FOE),
> >> d2a2b8>
> >> <read_dev_mem: addr: ffffffff809b7548 paddr: 9b7548 cnt: 8>
> >> <readmem: ffffffff80a56588, KVADDR, "max_pfn", 8, (FOE), d2a2c0>
> >> <read_dev_mem: addr: ffffffff80a56588 paddr: a56588 cnt: 8>
> >> GETBUF(248 -> 0)
> >> FREEBUF(0)
> >> GETBUF(248 -> 0)
> >> FREEBUF(0)
> >> <readmem: ffffffff80a08e38, KVADDR, "timekeeper xtime_sec", 8, (ROE),
> >> 7fffb4ff6938>
> >> <read_dev_mem: addr: ffffffff80a08e38 paddr: a08e38 cnt: 8>
> >> <readmem: ffffffff808647a4, KVADDR, "init_uts_ns", 390, (ROE), d1a0dc>
> >> <read_dev_mem: addr: ffffffff808647a4 paddr: 8647a4 cnt: 390>
> >> base kernel version: 0.0.0
> >> <readmem: ffffffff804c80c0, KVADDR, "accessible check", 8, (ROE|Q),
> >> 7fffb4ff3c98>
> >> <read_dev_mem: addr: ffffffff804c80c0 paddr: 4c80c0 cnt: 8>
> >> <readmem: ffffffff804c80c0, KVADDR, "read_string characters", 1499,
> >> (ROE|Q), 7fffb4ff3ff0>
> >> <read_dev_mem: addr: ffffffff804c80c0 paddr: 4c80c0 cnt: 1499>
> >> WARNING: cannot read linux_banner string
> >> /proc/version:
> >> Linux version 3.12.49-6-xen (geeko at buildhost) (gcc version 4.8.5 (SUSE
> >> Linux) ) #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> >> linux_banner:
> >>
> >> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_ecPt06 and /dev/mem do not match!
> >>
> >> Usage:
> >>
> >> crash [OPTION]... NAMELIST MEMORY-IMAGE[@ADDRESS] (dumpfile form)
> >> crash [OPTION]... [NAMELIST] (live system form)
> >>
> >> Enter "crash -h" for details.
> >>
> >> Thanks!
> >> Best Regards
> >> Nan Xiao
> >>
> >>
> >> On Tue, Nov 17, 2015 at 12:56 PM, Dave Anderson <anderson at prospeed.net>
> >> wrote:
> >> > Can you show the full output of "crash -d8"?
> >> >
> >> >
> >> >
> >> > Sent from my Verizon Wireless 4G LTE smartphone
> >> >
> >> >
> >> > -------- Original message --------
> >> > From: Nan Xiao <xiaonan830818 at gmail.com>
> >> > Date: 11/16/2015 8:55 PM (GMT-05:00)
> >> > To: "Discussion list for crash utility usage, maintenance and
> >> > development"
> >> > <crash-utility at redhat.com>
> >> > Subject: Re: [Crash-utility] The problems when running SuSE 12 on
> >> > VirtualBox
> >> >
> >> > Hi Dietmar & Dave,
> >> >
> >> > Thanks very much for your time and answer! But for question 3, there
> >> > is still no answer.
> >> >
> >> > I just execute "crash" with no parameters in the command line, and want
> >> > to
> >> > debug
> >> > Dom0:
> >> >
> >> > # crash
> >> > ......
> >> > WARNING: could not find MAGIC_START!
> >> > WARNING: cannot read linux_banner string
> >> > crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_JWv5bU and /dev/mem do not
> >> > match!
> >> > ......
> >> >
> >> > So why does this operation fail?
> >> > Best Regards
> >> > Nan Xiao
> >> >
> >> >
> >> > On Mon, Nov 16, 2015 at 10:48 PM, Dave Anderson <anderson at redhat.com>
> >> > wrote:
> >> >>
> >> >>
> >> >> ----- Original Message -----
> >> >>> Am Montag 16 November 2015, 14:01:35 schrieb Nan Xiao:
> >> >>> > Hi Dave,
> >> >>> >
> >> >>> > >> (2) "machine type mismatch"
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-4.5.1_10-1.gz_E5lLat: X86
> >> >>> > >>
> >> >>> > >> But according to "uname -a":
> >> >>> > >>
> >> >>> > >> # uname -a
> >> >>> > >> Linux linux-6ev3 3.12.49-6-xen #1 SMP Mon Oct 26 16:05:37 UTC
> >> >>> > >> 2015
> >> >>> > >> (11560c3) x86_64 x86_64 x86_64 GNU/Linux
> >> >>> > >>
> >> >>> > >> The running SuSE is also a 64-bit OS, so whether can remove these
> >> >>> > >> warnings?
> >> >>> >
> >> >>> > > The mismatch message says that "/var/tmp/xen-4.5.1_10-1.gz_E5lLat"
> >> >>> > > is
> >> >>> > > an X86
> >> >>> > > 32-bit binary. You cannot use a 32-bit xen binary with a 64-bit
> >> >>> > > crash utility
> >> >>> > > binary.
> >> >>> >
> >> >>> > > Run "gunzip xen-4.5.1_10-1.gz", and then run "file" on the
> >> >>> > > uncompressed file.
> >> >>> > > If it's a 32-bit binary, and the dumpfile came from that kernel,
> >> >>> > > then
> >> >>> > > you need
> >> >>> > > to use a 32-bit crash utility binary. If the dumpfile came from a
> >> >>> > > 64-bit kernel,
> >> >>> > > then you're using the wrong xen binary.
> >> >>> >
> >> >>> > According to this
> >> >>> >
> >> >>> > post(http://lists.xen.org/archives/html/xen-users/2015-10/msg00141.html),
> >> >>> > although the xen file is 32-bit, it is the correct file for running
> >> >>> > on
> >> >>> > 64-bit OS. So I am not sure it should be considered as a bug.
> >> >>>
> >> >>> No it's not a bug.
> >> >>> The file you mentioned is only used for booting the hypervisor. For
> >> >>> debugging
> >> >>> the hypervisor a statically linked hypervisor file has to be used.
> >> >>>
> >> >>> On SLES11 SP4 I have for booting the xen hypervisor:
> >> >>> # file xen-4.4.2_12-23.1
> >> >>> xen-4.4.2_12-23.1_x2: ELF 32-bit LSB executable, Intel 80386, version
> >> >>> 1
> >> >>> (SYSV), statically linked, stripped
> >> >>>
> >> >>> For working with crash and the vmcore:
> >> >>> # file xen-syms-4.4.2_12-23.1
> >> >>> xen-syms-4.4.2_12-23.1_x2: ELF 64-bit LSB executable, x86-64, version
> >> >>> 1
> >> >>> (SYSV), statically linked, not stripped
> >> >>
> >> >>
> >> >> Hi Dietmar,
> >> >>
> >> >> Thanks for clarifying that. I should have noticed he was trying to use
> >> >> the
> >> >> actual xen binary instead of the xen-syms file -- which is specified
> >> >> in
> >> >> the
> >> >> crash(8) man page.
> >> >>
> >> >> And I wasn't even aware that the actual xen binary is a 32-bit image --
> >> >> good
> >> >> to know...
> >> >>
> >> >> Thanks,
> >> >> Dave
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>>
> >> >>> >
> >> >>> > >> (3)
> >> >>> > >>
> >> >>> > >> WARNING: could not find MAGIC_START!
> >> >>> > >> WARNING: cannot read linux_banner string
> >> >>> > >> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_FjRFMJ and /dev/mem do
> >> >>> > >> not
> >> >>> > >> match!
> >> >>> > >>
> >> >>> > >> How can I fix this issue and run crash on SuSE?
> >> >>> >
> >> >>> > > For starters, make sure the kernel, the dumpfile, and the crash
> >> >>> > > binary
> >> >>> > > are all
> >> >>> > > 32-bit or all 64-bit, whichever is appropriate.
> >> >>> >
> >> >>> > # which crash
> >> >>> > /usr/bin/crash
> >> >>> >
> >> >>> > # file /usr/bin/crash
> >> >>> > /usr/bin/crash: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
> >> >>> > dynamically linked (uses shared libs), for GNU/Linux 3.0.0,
> >> >>> > BuildID[sha1]=e6f9921f98c5b4daedd8dac798c139b77676b588, stripped
> >> >>> >
> >> >>> > Using "crash /boot/vmlinux-3.12.49-6-xen.gz /proc/kcore" works OK:
> >> >>>
> >> >>> This is expected as this is similar to the xen behaviour.
> >> >>> For booting:
> >> >>> # file vmlinuz-3.0.101-63-xen
> >> >>> vmlinuz-3.0.101-63-xen: Linux/x86 Kernel, Setup Version 0x20b,
> >> >>> bzImage,
> >> >>> Version 3.0.101, Version 3.0.101-63, RO-rootFS, swap_dev 0x3, Normal
> >> >>> VGA
> >> >>>
> >> >>> And for debugging:
> >> >>> # file vmlinux-3.0.101-63-xen
> >> >>> vmlinux-3.0.101-63-xen: ELF 64-bit LSB executable, x86-64, version 1
> >> >>> (SYSV),
> >> >>> statically linked, not stripped
> >> >>>
> >> >>> Dietmar.
> >> >>>
> >> >>> >
> >> >>> > # file /proc/kcore
> >> >>> > /proc/kcore: ELF 64-bit LSB core file x86-64, version 1 (SYSV),
> >> >>> > SVR4-style, from 'root=UUID=ed63d5d7-1d2f-45ea-a77b-5b3ae05c1c2e
> >> >>> > resume=/dev/sda1 splash=silent q'
> >> >>> >
> >> >>> > # crash /boot/vmlinux-3.12.49-6-xen.gz /proc/kcore
> >> >>> >
> >> >>> > crash 7.1.3
> >> >>> > Copyright (C) 2002-2014 Red Hat, Inc.
> >> >>> > Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
> >> >>> > Copyright (C) 1999-2006 Hewlett-Packard Co
> >> >>> > Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
> >> >>> > Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
> >> >>> > Copyright (C) 2005, 2011 NEC Corporation
> >> >>> > Copyright (C) 1999, 2002, 2007 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 (GDB) 7.6
> >> >>> > Copyright (C) 2013 Free Software Foundation, Inc.
> >> >>> > License GPLv3+: GNU GPL version 3 or later
> >> >>> > <http://gnu.org/licenses/gpl.html>
> >> >>> > This is free software: you are free to change and redistribute it.
> >> >>> > There is NO WARRANTY, to the extent permitted by law. Type "show
> >> >>> > copying"
> >> >>> > and "show warranty" for details.
> >> >>> > This GDB was configured as "x86_64-unknown-linux-gnu"...
> >> >>> >
> >> >>> > KERNEL: /boot/vmlinux-3.12.49-6-xen.gz
> >> >>> > DEBUGINFO: /usr/lib/debug/boot/vmlinux-3.12.49-6-xen.debug
> >> >>> > DUMPFILE: /proc/kcore
> >> >>> > CPUS: 1
> >> >>> > DATE: Mon Nov 16 00:59:02 2015
> >> >>> > UPTIME: 04:55:39
> >> >>> > LOAD AVERAGE: 0.08, 0.03, 0.05
> >> >>> > TASKS: 241
> >> >>> > NODENAME: linux-6ev3
> >> >>> > RELEASE: 3.12.49-6-xen
> >> >>> > VERSION: #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> >> >>> > MACHINE: x86_64 (2596 Mhz)
> >> >>> > MEMORY: 855.2 MB
> >> >>> > PID: 7472
> >> >>> > COMMAND: "crash"
> >> >>> > TASK: ffff880019ab6540 [THREAD_INFO: ffff880002dcc000]
> >> >>> > CPU: 0
> >> >>> > STATE: TASK_RUNNING (ACTIVE)
> >> >>> >
> >> >>> > So I think all the files are 64-bits.
> >> >>> >
> >> >>> > Thanks!
> >> >>> > Best Regards
> >> >>> > Nan Xiao
> >> >>> >
> >> >>> >
> >> >>> > On Fri, Nov 13, 2015 at 10:54 PM, Dave Anderson
> >> >>> > <anderson at redhat.com>
> >> >>> > wrote:
> >> >>> > >
> >> >>> > >
> >> >>> > > ----- Original Message -----
> >> >>> > >> Hi all,
> >> >>> > >>
> >> >>> > >> Firstly, I am not sure whether posting this issue on this mailing
> >> >>> > >> list
> >> >>> > >> is appropriate, if not,
> >> >>> > >> please forgive me, thanks!
> >> >>> > >>
> >> >>> > >> I install SuSE Enterprise Linux 12 (Xen version) on VirtualBox,
> >> >>> > >> and
> >> >>> > >> want
> >> >>> > >> to use crash.
> >> >>> > >> Executing "crash" command, and the output likes this:
> >> >>> > >>
> >> >>> > >> # crash
> >> >>> > >>
> >> >>> > >> crash 7.1.3
> >> >>> > >> Copyright (C) 2002-2014 Red Hat, Inc.
> >> >>> > >> Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
> >> >>> > >> Copyright (C) 1999-2006 Hewlett-Packard Co
> >> >>> > >> Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
> >> >>> > >> Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
> >> >>> > >> Copyright (C) 2005, 2011 NEC Corporation
> >> >>> > >> Copyright (C) 1999, 2002, 2007 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.
> >> >>> > >>
> >> >>> > >> crash: /boot/symtypes-3.12.49-6-xen.gz: original filename unknown
> >> >>> > >> Use "-f /boot/symtypes-3.12.49-6-xen.gz" on command line to
> >> >>> > >> prevent
> >> >>> > >> this message.
> >> >>> > >>
> >> >>> > >> crash: /boot/symtypes-3.12.49-6-default.gz: original filename
> >> >>> > >> unknown
> >> >>> > >> Use "-f /boot/symtypes-3.12.49-6-default.gz" on command line to
> >> >>> > >> prevent this message.
> >> >>> > >>
> >> >>> > >> crash: /boot/xen-4.5.1_10-1.gz: original filename unknown
> >> >>> > >> Use "-f /boot/xen-4.5.1_10-1.gz" on command line to prevent
> >> >>> > >> this
> >> >>> > >> message.
> >> >>> > >>
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-4.5.1_10-1.gz_E5lLat: X86
> >> >>> > >>
> >> >>> > >> crash: /boot/xen-4.5.gz: original filename unknown
> >> >>> > >> Use "-f /boot/xen-4.5.gz" on command line to prevent this
> >> >>> > >> message.
> >> >>> > >>
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-4.5.gz_0BL7f2: X86
> >> >>> > >>
> >> >>> > >> crash: /boot/xen-4.gz: original filename unknown
> >> >>> > >> Use "-f /boot/xen-4.gz" on command line to prevent this
> >> >>> > >> message.
> >> >>> > >>
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-4.gz_PW97tB: X86
> >> >>> > >>
> >> >>> > >> crash: /boot/xen-dbg-4.5.1_10-1.gz: original filename unknown
> >> >>> > >> Use "-f /boot/xen-dbg-4.5.1_10-1.gz" on command line to prevent
> >> >>> > >> this
> >> >>> > >> message.
> >> >>> > >>
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-dbg-4.5.1_10-1.gz_zcILOa: X86
> >> >>> > >>
> >> >>> > >> crash: /boot/xen-dbg-4.5.gz: original filename unknown
> >> >>> > >> Use "-f /boot/xen-dbg-4.5.gz" on command line to prevent this
> >> >>> > >> message.
> >> >>> > >>
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-dbg-4.5.gz_AEpJfK: X86
> >> >>> > >>
> >> >>> > >> crash: /boot/xen-dbg-4.gz: original filename unknown
> >> >>> > >> Use "-f /boot/xen-dbg-4.gz" on command line to prevent this
> >> >>> > >> message.
> >> >>> > >>
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-dbg-4.gz_np36Nj: X86
> >> >>> > >>
> >> >>> > >> crash: /boot/xen-dbg.gz: original filename unknown
> >> >>> > >> Use "-f /boot/xen-dbg.gz" on command line to prevent this
> >> >>> > >> message.
> >> >>> > >>
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-dbg.gz_1tAiuT: X86
> >> >>> > >>
> >> >>> > >> crash: /boot/xen.gz: original filename unknown
> >> >>> > >> Use "-f /boot/xen.gz" on command line to prevent this message.
> >> >>> > >>
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen.gz_htZLuv: X86
> >> >>> > >>
> >> >>> > >> crash: /boot/symvers-3.12.49-6-xen.gz: original filename unknown
> >> >>> > >> Use "-f /boot/symvers-3.12.49-6-xen.gz" on command line to
> >> >>> > >> prevent
> >> >>> > >> this message.
> >> >>> > >>
> >> >>> > >> GNU gdb (GDB) 7.6
> >> >>> > >> Copyright (C) 2013 Free Software Foundation, Inc.
> >> >>> > >> License GPLv3+: GNU GPL version 3 or later
> >> >>> > >> <http://gnu.org/licenses/gpl.html>
> >> >>> > >> This is free software: you are free to change and redistribute
> >> >>> > >> it.
> >> >>> > >> There is NO WARRANTY, to the extent permitted by law. Type "show
> >> >>> > >> copying"
> >> >>> > >> and "show warranty" for details.
> >> >>> > >> This GDB was configured as "x86_64-unknown-linux-gnu"...
> >> >>> > >>
> >> >>> > >> WARNING: could not find MAGIC_START!
> >> >>> > >> WARNING: cannot read linux_banner string
> >> >>> > >> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_FjRFMJ and /dev/mem do
> >> >>> > >> not
> >> >>> > >> match!
> >> >>> > >>
> >> >>> > >> Usage:
> >> >>> > >>
> >> >>> > >> crash [OPTION]... NAMELIST MEMORY-IMAGE[@ADDRESS] (dumpfile
> >> >>> > >> form)
> >> >>> > >> crash [OPTION]... [NAMELIST] (live
> >> >>> > >> system
> >> >>> > >> form)
> >> >>> > >>
> >> >>> > >> Enter "crash -h" for details.
> >> >>> > >>
> >> >>> > >> My question are as follows:
> >> >>> > >>
> >> >>> > >> (1) There are so may warnings like this:
> >> >>> > >>
> >> >>> > >> crash: xxxxxx: original filename unknown
> >> >>> > >> Use "-f xxxxxx" on command line to prevent this message.
> >> >>> > >>
> >> >>> > >> Do I need to add somay "-f xxxxxx" options on command line? Is
> >> >>> > >> there
> >> >>> > >> any better method?
> >> >>> > >
> >> >>> > > The message above simply mean that the original filename of the
> >> >>> > > compressed
> >> >>> > > file was not stored in the file's header. That means that whoever
> >> >>> > > created
> >> >>> > > the compressed file used "gzip -n" or "--no-name":
> >> >>> > >
> >> >>> > > $ man gzip
> >> >>> > > ... [ cut ] ...
> >> >>> > >
> >> >>> > > -n --no-name
> >> >>> > > When compressing, do not save the original file name
> >> >>> > > and
> >> >>> > > time
> >> >>> > > stamp by default. (The original name is always saved if
> >> >>> > > the
> >> >>> > > name
> >> >>> > > had to be truncated.) When decompressing, do not restore
> >> >>> > > the
> >> >>> > > original file name if present (remove only the gzip
> >> >>> > > suffix
> >> >>> > > from
> >> >>> > > the compressed file name) and do not restore the
> >> >>> > > original
> >> >>> > > time
> >> >>> > > stamp
> >> >>> > > if present (copy it from the compressed file). This
> >> >>> > > option
> >> >>> > > is
> >> >>> > > the
> >> >>> > > default when decompressing.
> >> >>> > > ...
> >> >>> > >
> >> >>> > >> (2) "machine type mismatch"
> >> >>> > >> WARNING: machine type mismatch:
> >> >>> > >> crash utility: X86_64
> >> >>> > >> /var/tmp/xen-4.5.1_10-1.gz_E5lLat: X86
> >> >>> > >>
> >> >>> > >> But according to "uname -a":
> >> >>> > >>
> >> >>> > >> # uname -a
> >> >>> > >> Linux linux-6ev3 3.12.49-6-xen #1 SMP Mon Oct 26 16:05:37 UTC
> >> >>> > >> 2015
> >> >>> > >> (11560c3) x86_64 x86_64 x86_64 GNU/Linux
> >> >>> > >>
> >> >>> > >> The running SuSE is also a 64-bit OS, so whether can remove these
> >> >>> > >> warnings?
> >> >>> > >
> >> >>> > > The mismatch message says that "/var/tmp/xen-4.5.1_10-1.gz_E5lLat"
> >> >>> > > is
> >> >>> > > an
> >> >>> > > X86
> >> >>> > > 32-bit binary. You cannot use a 32-bit xen binary with a 64-bit
> >> >>> > > crash
> >> >>> > > utility
> >> >>> > > binary.
> >> >>> > >
> >> >>> > > Run "gunzip xen-4.5.1_10-1.gz", and then run "file" on the
> >> >>> > > uncompressed
> >> >>> > > file.
> >> >>> > > If it's a 32-bit binary, and the dumpfile came from that kernel,
> >> >>> > > then
> >> >>> > > you
> >> >>> > > need
> >> >>> > > to use a 32-bit crash utility binary. If the dumpfile came from a
> >> >>> > > 64-bit
> >> >>> > > kernel,
> >> >>> > > then you're using the wrong xen binary.
> >> >>> > >
> >> >>> > >> (3)
> >> >>> > >>
> >> >>> > >> WARNING: could not find MAGIC_START!
> >> >>> > >> WARNING: cannot read linux_banner string
> >> >>> > >> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_FjRFMJ and /dev/mem do
> >> >>> > >> not
> >> >>> > >> match!
> >> >>> > >>
> >> >>> > >> How can I fix this issue and run crash on SuSE?
> >> >>> > >
> >> >>> > > For starters, make sure the kernel, the dumpfile, and the crash
> >> >>> > > binary are all
> >> >>> > > 32-bit or all 64-bit, whichever is appropriate.
> >> >>> > >
> >> >>> > > Dave
> >> >>> > >
> >> >>> > >>
> >> >>> > >> Thanks very much in advance!
> >> >>> > >> Best Regards
> >> >>> > >> Nan Xiao
> >> >>> > >>
> >> >>> > >> --
> >> >>> > >> Crash-utility mailing list
> >> >>> > >> Crash-utility at redhat.com
> >> >>> > >> https://www.redhat.com/mailman/listinfo/crash-utility
> >> >>> > >>
> >> >>> > >
> >> >>> > > --
> >> >>> > > Crash-utility mailing list
> >> >>> > > Crash-utility at redhat.com
> >> >>> > > https://www.redhat.com/mailman/listinfo/crash-utility
> >> >>> >
> >> >>> > --
> >> >>> > Crash-utility mailing list
> >> >>> > Crash-utility at redhat.com
> >> >>> > https://www.redhat.com/mailman/listinfo/crash-utility
> >> >>> >
> >> >>>
> >> >>> --
> >> >>> Company details: http://ts.fujitsu.com/imprint.html
> >> >>>
> >> >>> --
> >> >>> Crash-utility mailing list
> >> >>> Crash-utility at redhat.com
> >> >>> https://www.redhat.com/mailman/listinfo/crash-utility
> >> >>>
> >> >>
> >> >> --
> >> >> Crash-utility mailing list
> >> >> Crash-utility at redhat.com
> >> >> https://www.redhat.com/mailman/listinfo/crash-utility
> >> >
> >> > --
> >> > Crash-utility mailing list
> >> > Crash-utility at redhat.com
> >> > https://www.redhat.com/mailman/listinfo/crash-utility
> >> >
> >> >
> >> > --
> >> > Crash-utility mailing list
> >> > Crash-utility at redhat.com
> >> > https://www.redhat.com/mailman/listinfo/crash-utility
> >>
> >> --
> >> Crash-utility mailing list
> >> Crash-utility at redhat.com
> >> https://www.redhat.com/mailman/listinfo/crash-utility
> >>
> >
> > --
> > Crash-utility mailing list
> > Crash-utility at redhat.com
> > https://www.redhat.com/mailman/listinfo/crash-utility
>
> --
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> Crash-utility at redhat.com
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