[CentOS] Memory for crash kernel

when I run dmesg PE2950 Dell Server I see the following line

Linux version 2.6.18-92.1.6.el5 (mockbuild at builder15.centos.org) (gcc
version 4.1.2 20071124 (Red Hat 4.1.2-42)) #1 SMP Wed J
un 25 13:45:47 EDT 2008
Command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 0000000000100000 - 00000000cfb50000 (usable)
 .....
 BIOS-e820: 0000000100000000 - 0000000230000000 (usable)
DMI 2.5 present.
ACPI: RSDP (v002 DELL                                  ) @
0x00000000000f21c0
ACPI: XSDT (v001 DELL   PE_SC3   0x00000001 DELL 0x00000001) @
0x00000000000f225c
ACPI: FADT (v003 DELL   PE_SC3   0x00000001 DELL 0x00000001) @
0x00000000cfb83524
.............0000000cfb6a974
ACPI: EINJ (v001 DELL   PE_SC3   0x00000001 DELL 0x00000001) @
0x00000000cfb6a9a4
ACPI: TCPA (v001 DELL   PE_SC3   0x00000001 DELL 0x00000001) @
0x00000000cfb834bc
ACPI: DSDT (v001 DELL   PE_SC3   0x00000001 INTL 0x20050624) @
0x0000000000000000
No NUMA configuration found
Faking a node at 0000000000000000-0000000230000000
Bootmem setup node 0 0000000000000000-0000000230000000
Memory for crash kernel (0x0 to 0x0) notwithin permissible range
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

any input about this issue?

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