unfortunately, the memory management in Linux is completely transparent to userspace which means the advantages of placing your data in different banks is totally not doable.
it's really only possible when you're writing your own bare-metal applications as then you have full control over the physical memory layout. your custom linker scripts would place the data such that you make sure specific pieces of data lie in specific banks.
of course, this is beyond the stated scope as it isnt Linux :)
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