On Mar 24, 2008, at 10:18 PM, Zhang Wei wrote:
Hi, Kumar,
-----Original Message-----
From: [EMAIL PROTECTED]
total_lowmem represents the amount of low memory not the
physical address
that low memory ends at. If the start of memory is at 0 it
happends that
total_lowmem can be used as both the size and the address that lowmem
ends at. (technical its one byte beyond the end)
To make the code a bit more clear and deal with the case when
the start of
memory isn't at physical 0, we introduce lowmem_end_addr that
represents
one byte beyond the last physical address in the lowmem region.
About the kernel memory offset, if the memory area from phyical 0
to lowmem start address is reserved for other usage in this kernel,
no more comments. If it will be used by other kernel (in asmp mode),
how about to use tlb mapping physical address to virtual address 0
not move the kernel lowmem address? I consider the tlb mapping
will be more safe.
I'm not sure I follow your question.
- k
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