On Fri, Jan 21, 2011 at 7:38 PM, Russell King - ARM Linux
[off-list ref] wrote:

On Fri, Jan 21, 2011 at 11:12:27AM +0900, KyongHo Cho wrote:

quoted

Since the size of section is 256 mib and NR_BANKS is defined as 8,
no ARM system can have more RAM than 2GiB in the current implementation.
If you want banks in meminfo not to cross sparsemem boundaries,
we need to find another way of physical memory specification in the kernel.

There is no problem with increasing NR_BANKS.
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I think it is not reasonable to split a contiguous physical memory
into several chunks.
9 banks are required to use 2 gib.
Even though you think it is no problem,
it becomes a problem when we want to give physical memory information
via booting command line but atag
because there is a restriction in number of characters in booting command line.

I don't understand why larger bank size than the section size is problem.

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