[Crash-utility] The problems when running SuSE 12 on VirtualBox
Dave Anderson
anderson at redhat.com
Wed Nov 18 15:13:00 UTC 2015
By the way, perhaps there's an issue caused by running Xen inside VirtualBox?
----- Original Message -----
>
>
> ----- 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
> >
> > --
> > Crash-utility mailing list
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