Description of problem:
I have a dual Xeon E5520.
When I enable kdump, on crash the machine tries to boot the second kernel.
The second kernel starts booting but it hangs right after the line:
Kernel command line: ro pci=noacpi earlyprintk=serial,ttyS0,9600n8 root=/dev/mapper/vg_splat-lv_current vmalloc=256M panic=15 console=ttyS0 3 quiet  irqpoll maxcpus=1 memmap=exactmap memmap=640K@0K mK...

NOTE:
If I add to the first kernel the noapic flag the problem disappears.


Version-Release number of selected component (if applicable):
I am using:
kernel-2.6.18-92
kexec-tools-1.101-194
cmdline:
ro pci=noacpi earlyprintk=serial,ttyS0,9600n8 root=/dev/mapper/vg_splat-lv_current vmalloc=256M panic=15 console=ttyS0 3 quiet 

How reproducible:
Always

Steps to Reproduce:
1.enable kdump
2.echo c > /proc/sysreq-trigger
  
Actual results:
Hang

Expected results:
Reboot + vmcore created

Additional info:

SysRq : Trigger a crashdump

I'm in purgatory
Linux version 2.6.18-92 (xxx.com) (gcc version 4.1.2 20070626 (Red Hat 4.1.2-14)) #8 SMP Mon Apr 16 09:39:46 IDT 2012
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000100 - 000000000009d800 (usable)
 BIOS-e820: 000000000009d800 - 00000000000a0000 (reserved)
 BIOS-e820: 0000000000100000 - 00000000bf7b0000 (usable)
 BIOS-e820: 00000000bf7b0000 - 00000000bf7be000 (ACPI data)
 BIOS-e820: 00000000bf7be000 - 00000000bf7d0000 (ACPI NVS)
 BIOS-e820: 00000000bf7d0000 - 00000000bf7e0000 (reserved)
 BIOS-e820: 00000000bf7ec000 - 00000000c0000000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
 BIOS-e820: 00000000ffc00000 - 0000000100000000 (reserved)
 BIOS-e820: 0000000100000000 - 00000001c0000000 (usable)
user-defined physical RAM map:
 user: 0000000000000000 - 00000000000a0000 (usable)
 user: 0000000001000000 - 00000000014f1000 (usable)
 user: 0000000001591400 - 0000000005000000 (usable)
early console enabled
0MB HIGHMEM available.
80MB LOWMEM available.
found SMP MP-table at 000ff780
Memory for crash kernel (0x0 to 0x0) notwithin permissible range
disabling kdump
NX (Execute Disable) protection: active
DMI present.
Using APIC driver default
  >>> ERROR: Invalid checksum
ACPI: PM-Timer IO Port: 0x808
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
Processor #0 7:10 APIC version 21
ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled)
Processor #2 7:10 APIC version 21
WARNING: maxcpus limit of 1 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x03] lapic_id[0x04] enabled)
Processor #4 7:10 APIC version 21
WARNING: maxcpus limit of 1 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x04] lapic_id[0x06] enabled)
Processor #6 7:10 APIC version 21
WARNING: maxcpus limit of 1 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x05] lapic_id[0x10] enabled)
Processor #16 7:10 APIC version 21
WARNING: maxcpus limit of 1 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x06] lapic_id[0x12] enabled)
Processor #18 7:10 APIC version 21
WARNING: maxcpus limit of 1 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x07] lapic_id[0x14] enabled)
Processor #20 7:10 APIC version 21
WARNING: maxcpus limit of 1 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x08] lapic_id[0x16] enabled)
Processor #22 7:10 APIC version 21
WARNING: maxcpus limit of 1 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x09] lapic_id[0x88] disabled)
ACPI: LAPIC (acpi_id[0x0a] lapic_id[0x89] disabled)
ACPI: LAPIC (acpi_id[0x0b] lapic_id[0x8a] disabled)
ACPI: LAPIC (acpi_id[0x0c] lapic_id[0x8b] disabled)
ACPI: LAPIC (acpi_id[0x0d] lapic_id[0x8c] disabled)
ACPI: LAPIC (acpi_id[0x0e] lapic_id[0x8d] disabled)
ACPI: LAPIC (acpi_id[0x0f] lapic_id[0x8e] disabled)
ACPI: LAPIC (acpi_id[0x10] lapic_id[0x8f] disabled)
ACPI: LAPIC (acpi_id[0x11] lapic_id[0x90] disabled)
ACPI: LAPIC (acpi_id[0x12] lapic_id[0x91] disabled)
ACPI: LAPIC (acpi_id[0x13] lapic_id[0x92] disabled)
ACPI: LAPIC (acpi_id[0x14] lapic_id[0x93] disabled)
ACPI: LAPIC (acpi_id[0x15] lapic_id[0x94] disabled)
ACPI: LAPIC (acpi_id[0x16] lapic_id[0x95] disabled)
ACPI: LAPIC (acpi_id[0x17] lapic_id[0x96] disabled)
ACPI: LAPIC (acpi_id[0x18] lapic_id[0x97] disabled)
Using ACPI for processor (LAPIC) configuration information
Intel MultiProcessor Specification v1.4
    Virtual Wire compatibility mode.
OEM ID: INTEL    Product ID: TYLERSBURG   APIC at: 0xFEE00000
I/O APIC #8 Version 32 at 0xFEC00000.
I/O APIC #9 Version 32 at 0xFEC8A000.
Enabling APIC mode:  Flat.  Using 2 I/O APICs
Processors: 1
Allocating PCI resources starting at 10000000 (gap: 05000000:fb000000)
Detected 2400.162 MHz processor.
Built 1 zonelists.  Total pages: 20480
Kernel command line: earlyprintk=serial,ttyS0,9600n8 ro pci=noacpi root=/dev/mapper/vg_splat-lv_current vmalloc=256M panic=15 console=ttyS0 3 quiet  irqpoll maxcpus=1 memmap=exactmap memmap=640K@0K memmap=5060K@16384K memmap=59835K@22085K elfcorehdr=22084K
Got stcuk here


Can BZ 462519 is related?
I can not access it. (Access denied)
Can you direct me to a patch for this issue.

Thanks in advance.