David VomLehn wrote: > On MIPS processors, the kernel runs in unmapped memory, i.e. the TLB > isn't even > used, so I don't think you can use that trick. So, this comment doesn't > apply to > all processors. In that case you have a choice between the overhead of sparsemem lookups in every pfn_to_page or using TLB entries to create a virtually mapped memmap which may create TLB pressure. The virtually mapped memmap results in smaller code and is typically more effective since the processor caches the TLB entries.
