Kdump kernel (the 2nd kernel) sometimes hungs up.

Issue

• This problem occurs once every 15 times when vmcore is gathered on PRIMEQUEST 1800E.

• And, the environment in which this problem occurs uses "Legacy Boot"  (conventional BIOS) to avoid another problem.

• At present, this problem has not been reproduced on other machines.

• Additionally, the phenomena occurred so far only on Intel64. I have not confirmed whether this phenomena occurs on x86.

• Here's log

  <snip>
   processor LNXCPU:54: registered as cooling_device16
   processor LNXCPU:55: registered as cooling_device17
   processor LNXCPU:57: registered as cooling_device18
   processor LNXCPU:58: registered as cooling_device19
   BIOS reported wrong ACPI id for the processor
   processor LNXCPU:5b: registered as cooling_device20
   processor LNXCPU:5c: registered as cooling_device21
   processor LNXCPU:5d: registered as cooling_device22
   processor LNXCPU:5f: registered as cooling_device23
   xen-platform-pci: failed Xen IOPORT backend handshake: unrecognised magic value
   Non-volatile memory driver v1.3
   Linux agpgart interface v0.103
   crash memory driver: version 1.0
   Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
   erial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
   serial8250: ttyS1 at I/O 0x2f8 (irq = 0) is a 16550A
   00:02: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
   brd: module loaded
  

• The above-mentioned message is displayed and the system hangs up. And the last message displayed before hang-up differs each time the problem occurs.