Re: crash can live analysis but vmcore can't.

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on another machine,I use all kinds of crash command :
 
 
Vsles11sp1 /mnt/disk/crash/2012-03-24-18:57 #crash vmlinux-2.6.27.19-5-default.gz System.map-2.6.27.19-5-default vmcore
 
crash 6.0.4
Copyright (C) 2002-2012  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005, 2006  Fujitsu Limited
Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
Copyright (C) 2005  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) 7.3.1
Copyright (C) 2011 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"...
 
crash: /var/tmp/vmlinux-2.6.27.19-5-default.gz_RYx9JC: no debugging data available
Vsles11sp1 /mnt/disk/crash/2012-03-24-18:57 #gunzip vmlinux-2.6.27.19-5-default.gz
Vsles11sp1 /mnt/disk/crash/2012-03-24-18:57 #crash vmlinux-2.6.27.19-5-default vmlinux-2.6.27.19-5-default.debug vmcore
 
crash 6.0.4
Copyright (C) 2002-2012  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005, 2006  Fujitsu Limited
Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
Copyright (C) 2005  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) 7.3.1
Copyright (C) 2011 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!
crash: vmlinux-2.6.27.19-5-default.debug and vmcore do not match!
 
Usage:
 
  crash [OPTION]... NAMELIST MEMORY-IMAGE  (dumpfile form)
  crash [OPTION]... [NAMELIST]             (live system form)
 
Enter "crash -h" for details.
 
Vsles11sp1 /mnt/disk/crash/2012-03-24-18:57 #cat README.txt
Kernel crashdump
----------------
 
Crash time     : 2012-03-24 10:57 (+0000)
Kernel version : 2.6.27.19-5-default
Host           : sles11
Dump level     : 0
Dump format    : compressed
but I use another command is OK, what's wrong ?
 
Vsles11sp1 /mnt/disk/crash/2012-03-24-18:57 #crash vmlinux-2.6.27.19-5-default System.map-2.6.27.19-5-default vmcore
 
crash 6.0.4
Copyright (C) 2002-2012  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005, 2006  Fujitsu Limited
Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
Copyright (C) 2005  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) 7.3.1
Copyright (C) 2011 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"...
 
  SYSTEM MAP: System.map-2.6.27.19-5-default
DEBUG KERNEL: vmlinux-2.6.27.19-5-default (2.6.27.19-5-default)
    DUMPFILE: vmcore
        CPUS: 2
        DATE: Sat Mar 24 18:57:31 2012
      UPTIME: 00:13:30
LOAD AVERAGE: 0.27, 0.30, 0.28
       TASKS: 190
    NODENAME: sles11
     RELEASE: 2.6.27.19-5-default
     VERSION: #6 SMP Sat Nov 12 08:58:08 CST 2011
     MACHINE: x86_64  (2393 Mhz)
      MEMORY: 3.9 GB
       PANIC: "SysRq : Trigger a crashdump"
         PID: 4700
     COMMAND: "bash"
        TASK: ffff88007f8f6080  [THREAD_INFO: ffff88007f802000]
         CPU: 0
       STATE: TASK_RUNNING (SYSRQ)
 
crash>
 
 


Sent: Saturday, March 24, 2012 8:07 PM
Subject: crash can live analysis but vmcore can't.

hello  experts:
 
My linux system : Suse SLES 11  , crash can live analysis, but can't open vmcore generated by kdump.
 
why?
 
 
 
sles11:/mnt/sda12/crash/2012-03-24-18:57 # crash
 
crash 6.0.4
Copyright (C) 2002-2012  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005, 2006  Fujitsu Limited
Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
Copyright (C) 2005  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) 7.3.1
     Copyright (C) 2011 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/vmlinuz-2.6.27.19-5-default.vmlinux-debug
               DUMPFILE: /dev/mem
                       CPUS: 2
                               DATE: Sat Mar 24 19:10:45 2012
                                     UPTIME: 00:07:17
                                     LOAD AVERAGE: 0.16, 0.19, 0.12
                                            TASKS: 189
                                                NODENAME: sles11
                                                     RELEASE: 2.6.27.19-5-default
                                                          VERSION: #6 SMP Sat Nov 12 08:58:08 CST 2011
                                                               MACHINE: x86_64  (2393 Mhz)
          MEMORY: 3.9 GB
                   PID: 4590
                        COMMAND: "crash"
                                TASK: ffff8801230fa340  [THREAD_INFO: ffff880131c86000]
                                         CPU: 0
                                                STATE: TASK_RUNNING (ACTIVE)
 
    crash>
   
 
 
 
sles11:/mnt/sda12/crash/2012-03-24-18:57 # crash vmlinux-2.6.27.19-5-default.gz vmlinux-2.6.27.19-5-default.debug vmcore

crash 6.0.4
Copyright (C) 2002-2012  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005, 2006  Fujitsu Limited
Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
Copyright (C) 2005  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.
 
please wait... (uncompressing vmlinux-2.6.27.19-5-default.gz)
                                                             
compressed kdump: header->utsname.machine:
compressed kdump: memory bitmap offset: 2000
diskdump_data:
          filename: vmcore
             flags: 6 (KDUMP_CMPRS_LOCAL|ERROR_EXCLUDED)
               dfd: 4
               ofp: 0
      machine_type: 62 (EM_X86_64)
 
            header: dee020
           signature: "KDUMP   "
      header_version: 1
             utsname:
               sysname:
              nodename:
               release:
               version:
               machine:
            domainname:
           timestamp:
                tv_sec: 0
               tv_usec: 0
              status: 0 ()
          block_size: 4096
        sub_hdr_size: 1
       bitmap_blocks: 80
           max_mapnr: 1294336
    total_ram_blocks: 0
       device_blocks: 0
      written_blocks: 0
         current_cpu: 0
             nr_cpus: 1
      tasks[nr_cpus]: 0
 
        sub_header: 0 (n/a)
 
  sub_header_kdump: def030
           phys_base: 0
          dump_level: 0 (0x0)
 
       data_offset: 52000
        block_size: 4096
       block_shift: 12
            bitmap: 7f812de69010
        bitmap_len: 327680
   dumpable_bitmap: 7f812de18010
              byte: 0
               bit: 0
   compressed_page: e00a40
         curbufptr: 0
 
 page_cache_hdr[0]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df0a30
        pg_hit_count: 0
 page_cache_hdr[1]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df1a30
        pg_hit_count: 0
 page_cache_hdr[2]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df2a30
        pg_hit_count: 0
 page_cache_hdr[3]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df3a30
        pg_hit_count: 0
 page_cache_hdr[4]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df4a30
        pg_hit_count: 0
 page_cache_hdr[5]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df5a30
        pg_hit_count: 0
 page_cache_hdr[6]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df6a30
        pg_hit_count: 0
 page_cache_hdr[7]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df7a30
        pg_hit_count: 0
 page_cache_hdr[8]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df8a30
        pg_hit_count: 0
 page_cache_hdr[9]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: df9a30
        pg_hit_count: 0
page_cache_hdr[10]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: dfaa30
        pg_hit_count: 0
page_cache_hdr[11]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: dfba30
        pg_hit_count: 0
page_cache_hdr[12]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: dfca30
        pg_hit_count: 0
page_cache_hdr[13]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: dfda30
        pg_hit_count: 0
page_cache_hdr[14]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: dfea30
        pg_hit_count: 0
page_cache_hdr[15]:
            pg_flags: 0 ()
             pg_addr: 0
           pg_bufptr: dffa30
        pg_hit_count: 0
 
    page_cache_buf: df0a30
       evict_index: 0
         evictions: 0
          accesses: 0
      cached_reads: 0
       valid_pages: df0040
readmem: read_diskdump()
[?1034hcompressed kdump: phys_base: 0
gdb vmlinux-2.6.27.19-5-default.debug
GNU gdb (GDB) 7.3.1
Copyright (C) 2011 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)
 
please wait... (patching 35285 gdb minimal_symbol values)
                                                                      
  FREEBUF(1)
FREEBUF(0)
<readmem: ffffffff804b8210, KVADDR, "kernel_config_data", 32768, (ROE), 17e92b0>
<read_diskdump: addr: ffffffff804b8210 paddr: 4b8210 cnt: 3568>
read_diskdump: paddr/pfn: 4b8210/4b8 -> cache physical page: 4b8000
<read_diskdump: addr: ffffffff804b9000 paddr: 4b9000 cnt: 4096>
read_diskdump: paddr/pfn: 4b9000/4b9 -> cache physical page: 4b9000
<read_diskdump: addr: ffffffff804ba000 paddr: 4ba000 cnt: 4096>
read_diskdump: paddr/pfn: 4ba000/4ba -> cache physical page: 4ba000
<read_diskdump: addr: ffffffff804bb000 paddr: 4bb000 cnt: 4096>
read_diskdump: paddr/pfn: 4bb000/4bb -> cache physical page: 4bb000
<read_diskdump: addr: ffffffff804bc000 paddr: 4bc000 cnt: 4096>
read_diskdump: paddr/pfn: 4bc000/4bc -> cache physical page: 4bc000
<read_diskdump: addr: ffffffff804bd000 paddr: 4bd000 cnt: 4096>
read_diskdump: paddr/pfn: 4bd000/4bd -> cache physical page: 4bd000
<read_diskdump: addr: ffffffff804be000 paddr: 4be000 cnt: 4096>
read_diskdump: paddr/pfn: 4be000/4be -> cache physical page: 4be000
<read_diskdump: addr: ffffffff804bf000 paddr: 4bf000 cnt: 4096>
read_diskdump: paddr/pfn: 4bf000/4bf -> cache physical page: 4bf000
<read_diskdump: addr: ffffffff804c0000 paddr: 4c0000 cnt: 528>
read_diskdump: paddr/pfn: 4c0000/4c0 -> cache physical page: 4c0000
WARNING: could not find MAGIC_START!
GETBUF(248 -> 0)
FREEBUF(0)
GETBUF(64 -> 0)
<readmem: ffffffff80a59910, KVADDR, "possible", 64, (ROE), da00e0>
<read_diskdump: addr: ffffffff80a59910 paddr: a59910 cnt: 64>
read_diskdump: paddr/pfn: a59910/a59 -> cache physical page: a59000
cpu_possible_map:
<readmem: ffffffff8095d950, KVADDR, "present", 64, (ROE), da00e0>
<read_diskdump: addr: ffffffff8095d950 paddr: 95d950 cnt: 64>
read_diskdump: paddr/pfn: 95d950/95d -> cache physical page: 95d000
cpu_present_map: 2 3 6 7 10 11 14 15 18 19 22 23 26 27 30 31 34 35 38 39 42 43 46 47 50 51 54 55 58 59 62 63 66 67 70 71 74 75 78 79 82 83 86 87 90 91 94 95 98 99 102 103 106 107 110 111 114 115 118 119 122 123 126 127 130 131 134 135 138 139 142 143 146 147 150 151 154 155 158 159 162 163 166 167 170 171 174 175 178 179 182 183 186 187 190 191 194 195 198 199 202 203 206 207 210 211 214 215 218 219 222 223 226 227 230 231 234 235 238 239 242 243 246 247 250 251 254 255 258 259 262 263 266 267 270 271 274 275 278 279 282 283 286 287 290 291 294 295 298 299 302 303 306 307 310 311 314 315 318 319 322 323 326 327 330 331 334 335 338 339 342 343 346 347 350 351 354 355 358 359 362 363 366 367 370 371 374 375 378 379 382 383 386 387 390 391 394 395 398 399 402 403 406 407 410 411 414 415 418 419 422 423 426 427 430 431 434 435 438 439 442 443 446 447 450 451 454 455 458 459 462 463 466 467 470 471 474 475 478 479 482 483 486 487 490 491 494 495 498 499 502 503 506 507 510 511
<readmem: ffffffff808cbe90, KVADDR, "online", 64, (ROE), da00e0>
<read_diskdump: addr: ffffffff808cbe90 paddr: 8cbe90 cnt: 64>
read_diskdump: paddr/pfn: 8cbe90/8cb -> cache physical page: 8cb000
cpu_online_map:
FREEBUF(0)
<readmem: ffffffff80abaf00, KVADDR, "xtime", 16, (FOE), c5e430>
<read_diskdump: addr: ffffffff80abaf00 paddr: abaf00 cnt: 16>
read_diskdump: paddr/pfn: abaf00/aba -> cache physical page: aba000
<readmem: ffffffff806dc894, KVADDR, "init_uts_ns", 390, (ROE), c5ea1c>
<read_diskdump: addr: ffffffff806dc894 paddr: 6dc894 cnt: 390>
read_diskdump: paddr/pfn: 6dc894/6dc -> cache physical page: 6dc000
base kernel version: 0.0.0
<readmem: ffffffff804a7000, KVADDR, "accessible check", 8, (ROE|Q), 7fff35eeba88>
<read_diskdump: addr: ffffffff804a7000 paddr: 4a7000 cnt: 8>
read_diskdump: paddr/pfn: 4a7000/4a7 -> cache physical page: 4a7000
<readmem: ffffffff804a7000, KVADDR, "readstring characters", 1499, (ROE|Q), 7fff35eeaa70>
<read_diskdump: addr: ffffffff804a7000 paddr: 4a7000 cnt: 1499>
read_diskdump: paddr/pfn: 4a7000/4a7 -> physical page is cached: 4a7000
linux_banner:
?;€??
crash: vmlinux-2.6.27.19-5-default.debug and vmcore do not match!
 
Usage:
 
  crash [OPTION]... NAMELIST MEMORY-IMAGE  (dumpfile form)
  crash [OPTION]... [NAMELIST]             (live system form)
 
Enter "crash -h" for details.
 
 
 


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