Re: [PATCH 1/5] v2 Split the memory_block structure

On Fri, 2010-07-16 at 13:23 -0500, Nathan Fontenot wrote:

quoted

If the memory_block's state was inferred to be the same as each
memory_block_section, couldn't we just keep a start and end phys_index
in the memory_block, and get away from having memory_block_sections at
all?

Oooohhh... I like.  Looking at the code it appears this is possible.  I'll
try this out and include it in the next version of the patch.

Do you think we need to add an additional file to each memory block directory
to indicate the number of memory sections in the memory block that are actually
present? 

I think it's easiest to just say that each 'memory_block' can only hold
contiguous 'memory_block_sections', and we give either the start/end or
start/length pairs.  It gets a lot more complicated if we have to deal
with lots of holes.

I can just see the hardware designers reading this thread, with their
Dr. Evil laughs trying to come up with a reason to give us a couple of
terabytes of RAM with only every-other 16MB area populated. :)  

-- Dave