if I  use a pvops domU kernel version 2.6.32.18 crash works fine.  However if I use a pvops domU kernel version 2.6.32.21 I get the error messages:
 
    crash: cannot find mfn 874307 (0xd5743) in page index  
    crash: cannot read/find cr3 page

Any suggestions as to what is wrong?
 
-Thomas
 
 
(1) domU information:
    cat /proc/version
    Linux version 2.6.32.21-1 (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #1 SMP Tue Sep 7 15:40:55 PDT 2010

    cat /proc/cmdline
    root=UUID=ee471711-e94d-4ff1-973c-e45526adea25 ro  crashkernel=384M-2G:64M,2G-:128M  iommu=soft swiotlb=force  console=hvc0,115200n8 ip=:127.0.255.255::::eth0:dhcp

    cat /sys/kernel/kexec_crash_loaded
    1

     xen.cfg is using on_crash    = 'coredump-restart'
   
     core is generated by executing  echo c > /proc/sysrq-trigger on the domU.
 
 
(2) core file is generated by the domU crash
    -rw------- 1 root root 2145653832 Sep  9 09:42 /var/xen/dump/xyz/2010-0909-0942.13-xyz.1.core

 
(3) crash information
   crash-d99 /boot/vmlinux-2.6.32.21-1 /var/xen/dump/xyz/2010-0909-0942.13-xyz.1.core 
  
   crash 5.0.7
   ...
   crash: /var/xen/dump/xyz/2010-0909-0942.13-xyz.1.core: not a netdump ELF dumpfile
   crash: /var/xen/dump/xyz/2010-0909-0942.13-xyz.1.core: not a kdump ELF dumpfile

            flags: 109 (XENDUMP_LOCAL|XC_CORE_ELF|XC_CORE_P2M_CREATE)
              xfd: 3
        page_size: 4096
              ofp: 0
             page: 1d67c70
         panic_pc: 0
         panic_sp: 0
         accesses: 0
       cache_hits: 0
         last_pfn: -1
        redundant: 0
        poc[5000]: 1d68c80 (none used)
   
          xc_save:
                      nr_pfns: 0 (0x0)
                vmconfig_size: 0 (0x0)
                 vmconfig_buf: 0
               p2m_frame_list: 0 (none)
                     pfns_not: 0
              pfns_not_offset: 0
             vcpu_ctxt_offset: 0
      shared_info_page_offset: 0
              region_pfn_type: 0
                  batch_count: 0
                batch_offsets: 0 (none)
                 ia64_version: 0
            ia64_page_offsets: 0 (none)
   
          xc_core:
                       header:
                    xch_magic: f00febed (XC_CORE_MAGIC)
                 xch_nr_vcpus: 7
                 xch_nr_pages: 521792 (0x7f640)
              xch_ctxt_offset: 1896 (0x768)
             xch_index_offset: 2137305088 (0x7f64b000)
             xch_pages_offset: 45056 (0xb000)
                    elf_class: ELFCLASS64
            elf_strtab_offset: 2145653760 (0x7fe41400)
               format_version: 0000000000000001
           shared_info_offset: 38072 (0x94b8)
           elf_index_pfn[128]:
    0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1
    0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1
    0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1 0:-1
                   last_batch:
                        index: 0 (0 - 0)
                     accesses: 0
                   duplicates: 0
                        elf32: 0
                        elf64: 1d67040
                   p2m_frames: 0
         p2m_frame_index_list:
   
    Elf64_Ehdr:
                    e_ident: \177ELF
          e_ident[EI_CLASS]: 2 (ELFCLASS64)
           e_ident[EI_DATA]: 1 (ELFDATA2LSB)
        e_ident[EI_VERSION]: 1 (EV_CURRENT)
          e_ident[EI_OSABI]: 0 (ELFOSABI_SYSV)
     e_ident[EI_ABIVERSION]: 1
                     e_type: 4 (ET_CORE)
                  e_machine: 62 (EM_X86_64)
                  e_version: 1 (EV_CURRENT)
                    e_entry: 0
                    e_phoff: 0
                    e_shoff: 40
                    e_flags: 0
                   e_ehsize: 40
                e_phentsize: 38
                    e_phnum: 0
                e_shentsize: 40
                    e_shnum: 7
                 e_shstrndx: 1
   
   
    Elf64_Shdr:
                    sh_name: 0 ""
                    sh_type: 0 (SHT_NULL)
                   sh_flags: 0
                    sh_addr: 0
                  sh_offset: 0
                    sh_size: 0
                    sh_link: 0
                    sh_info: 0
               sh_addralign: 0
                 sh_entsize: 0
   
    Elf64_Shdr:
                    sh_name: 1 ".shstrtab"
                    sh_type: 3 (SHT_STRTAB)
                   sh_flags: 0
                    sh_addr: 0
                  sh_offset: 7fe41400
                    sh_size: 48
                    sh_link: 0
                    sh_info: 0
               sh_addralign: 0
                 sh_entsize: 0
                             .shstrtab
                             .note.Xen
                             .xen_prstatus
                             .xen_shared_info
                             .xen_pages
                             .xen_p2m
   
    Elf64_Shdr:
                    sh_name: b ".note.Xen"
                    sh_type: 7 (SHT_NOTE)
                   sh_flags: 0
                    sh_addr: 0
                  sh_offset: 200
                    sh_size: 568
                    sh_link: 0
                    sh_info: 0
               sh_addralign: 0
                 sh_entsize: 0
                     namesz: 4
                      descz: 0
                       type: 2000000 (XEN_ELFNOTE_DUMPCORE_NONE)
                       name: Xen
                             (empty)
                     namesz: 4
                      descz: 32
                       type: 2000001 (XEN_ELFNOTE_DUMPCORE_HEADER)
                       name: Xen
                             00000000f00febed 0000000000000007
                             000000000007f640 0000000000001000
                     namesz: 4
                      descz: 1280
                       type: 2000002 (XEN_ELFNOTE_DUMPCORE_XEN_VERSION)
   
                             0000000000000004 0000000000000000
                             ff003463722d312e 2400000000000008
                             7372657620636367 2e342e34206e6f69
                             746e756255282033 2d332e342e342075
                             3575746e75627534 ffff82c480002029
                             0000000000000001 0000000001aa0660
                             ffff006567646562 0000000000000001
                             006d6f632e69736c ffff880000000001
                             ffff82c480367c0e ffff82c400000100
                             20677541206e7553 34343a3930203120
                             205444502039323a ffff820030313032
                             2d302e332d6e6578 782034365f363878
                             782d302e332d6e65 68207032335f3638
                             782d302e332d6d76 76682032335f3638
                             38782d302e332d6d 7668207032335f36
                             38782d302e332d6d 0000002034365f36
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             0000000000000000 0000000000000000
                             616c696176616e75 7820343600656c62
                             782d302e332d6e65 68207032335f3638
                             782d302e332d6d76 76682032335f3638
                             38782d302e332d6d 7668207032335f36
                             ffff800000000000 0000000000001000
                     namesz: 4
                      descz: 8
                       type: 2000003 (XEN_ELFNOTE_DUMPCORE_FORMAT_VERSION)
                       name: Xen
                             0000000000000001
   
    Elf64_Shdr:
                    sh_type: 1 (SHT_PROGBITS)
                   sh_flags: 0
                    sh_addr: 0
                  sh_offset: 768
                    sh_size: 8d50
                    sh_link: 0
                    sh_info: 0
               sh_addralign: 8
                 sh_entsize: 1430
   
    Elf64_Shdr:
                    sh_name: 23 ".xen_shared_info"
                    sh_type: 1 (SHT_PROGBITS)
                   sh_flags: 0
                    sh_addr: 0
                  sh_offset: 94b8
                    sh_size: 1000
                    sh_link: 0
                    sh_info: 0
               sh_addralign: 8
                 sh_entsize: 1000
   
    Elf64_Shdr:
                    sh_name: 34 ".xen_pages"
                    sh_type: 1 (SHT_PROGBITS)
                   sh_flags: 0
                    sh_addr: 0
                  sh_offset: b000
                    sh_size: 7f640000
                    sh_link: 0
                    sh_info: 0
               sh_addralign: 1000
                 sh_entsize: 1000
   
    Elf64_Shdr:
                    sh_name: 3f ".xen_p2m"
                    sh_type: 1 (SHT_PROGBITS)
                   sh_flags: 0
                    sh_addr: 0
                  sh_offset: 7f64b000
                    sh_size: 7f6400
                    sh_link: 0
                    sh_info: 0
               sh_addralign: 8
                 sh_entsize: 10
   
    crash: pv_init_ops exists: ARCH_PVOPS
    gdb /boot/vmlinux-2.6.32.21-1
    GNU gdb (GDB) 7.0
    Copyright (C) 2009 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: ffffffff81614800, KVADDR, "kernel_config_data", 32768, (ROE), 2fed090>
        addr: ffffffff81614800  paddr: 1614800  cnt: 2048
    GETBUF(248 -> 0)
    FREEBUF(0)
    MEMBER_OFFSET(vcpu_guest_context, ctrlreg): 4984
    ctrlreg[0]: 80050033
    ctrlreg[1]: d5742000
    ctrlreg[2]: 0
    ctrlreg[3]: d5743000
    ctrlreg[4]: 2660
    ctrlreg[5]: 0
    ctrlreg[6]: 0
    ctrlreg[7]: 0
    crash: cannot find mfn 874307 (0xd5743) in page index
   
    crash: cannot read/find cr3 page