// there should this change.
	pallocChunksL2Bits  = heapAddrBits - logPallocChunkBytes - pallocChunksL1Bits
	pallocChunksL1Shift = pallocChunksL2Bits
)

// maxSearchAddr returns the maximum searchAddr value, which indicates
// that the heap has no free space.
//
// This function exists just to make it clear that this is the maximum address