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The article is misleading and the author has totally no clue on the complexity of user space memory management. Random on-disk virtual memory access will be a disaster if we just keep everything in so-called virtual memory without complicated cache mechanism.

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Let's not resort to attacks on the author. Consider that this article is at least 4 years old.

Are you sure? PHK is a quite seasoned FreeBSD kernel developer and did phkmalloc which was used in FreeBSD for a long time, see http://phk.freebsd.dk/pubs/malloc.pdf.

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