https://bugzilla.kernel.org/show_bug.cgi?id=51301
--- Comment #6 from Peter Hurley peter@hurleysoftware.com 2012-12-05 00:57:08 --- This is filesystem/block or memory manager-related.
I just built -next-20121204 and by the end of the build a 10gb machine had < 100mb of zone DMA32 and < 70mb zone NORMAL.