Memory descriptor overflow

Hi,
I'm working with the CVS Pistachio from maybe a month ago. When I boot
the kernel on a PowerPC I get a "Memory descriptor overflow" error:

<termdump>
[==== Pistachio PowerPC Open Firmware Boot Loader ====]
[==== Installing sigma0 ====]
- virt addr: 00200000, phys addr: 00200000, mem size: 00007284
  file size: 00004f24, file offset: 00000060
- ip: 00200000,  start: 00200000,  end: 00208000
[==== Installing the root task ====]
- virt addr: 00300000, phys addr: 00300000, mem size: 0000d200
  file size: 000041ac, file offset: 00000060
- ip: 00300000,  start: 00300000,  end: 0030e000
[==== Installing the kernel ====]
- virt addr: c0003100, phys addr: 00003100, mem size: 00001678
  file size: 00001678, file offset: 00003100
- virt addr: c0005778, phys addr: 00005778, mem size: 00039930
  file size: 00039930, file offset: 00005778
- virt addr: c00400a8, phys addr: 000400a8, mem size: 00005494
  file size: 00001178, file offset: 000400a8
- virt addr: d4000000, phys addr: 00060000, mem size: 00001004
  file size: 00001004, file offset: 00050000
- skipping an unloadable elf section: virt=: 00000000
- ip: c0005848,  start: 00003000,  end: 00062000
[==== Found the kernel interface page ====]
- kip virt: c0041000, kip phys: 00041000, kip size: 00000418
Kernel physical entry point: 00005848

[ L4 PowerPC ]
Activated MPSC debug console.
Initializing Kernel Debugger.
kmem_init (c0062000, c00e2000) [512K]
Kernel boot mem: 638976 bytes
Define user's virtual address space.
Memory descriptor overflow (max=460, n=40960)
</termdump>

The error occurs in method "bool memory_info_t::insert()". At the time
the error occurs it is called within "kip_mem_init()":
<code>
	// Define the user's virtual address space.
	TRACE_INIT( "Define user's virtual address space.\n" );
	kip->memory_info.insert( memdesc_t::conventional, true,
	                         (addr_t)0, (addr_t)KERNEL_OFFSET );
</code>
This is where the first 3 GB are dedicated to the user, if in user mode.

My questions are about this expression <code>if (n >= max_desc)</code>
in "bool memory_info_t::insert()":

1.) How (and where) is "n" calculated?
2.) Did I get it right that "max_desc" is calculated by the linker to
hold the number of bytes remaining in the 4K sized kernel data section
divided by the number of memory descriptors?

Cheers,

Martin.