Cc: Linus Torvalds <torvalds@...>, Pekka Enberg <penberg@...>, <linux-kernel@...>, Mel Gorman <mel@...>, Nick Piggin <npiggin@...>, Andrew Morton <akpm@...>, Rafael J. Wysocki <rjw@...>, <Yinghai.Lu@...>
Hmmmm. SECTION_SIZE_BITS == 26 means SECTIONS_SHIFT == 6.
Increasing SECTION_SIZE_BITS to 27 reduces SECTION_SHIFT to 5. Thereby
the number of sparsemem sections (NR_MEM_SECTIONS) is reduced to half (64
to 32).
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