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Date:      Sun, 7 Apr 2013 23:22:36 -0400 (EDT)
From:      Benjamin Kaduk <kaduk@MIT.EDU>
To:        Sebastian Feld <sebastian.n.feld@gmail.com>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: Multiple page size support on FreeBSD?
Message-ID:  <alpine.GSO.1.10.1304072319300.9389@multics.mit.edu>
In-Reply-To: <CAHnbEGJuo9Jvskxaog0xLVM_LOse695b4E3fKae7YufOAVZuBg@mail.gmail.com>
References:  <CAHnbEGJuo9Jvskxaog0xLVM_LOse695b4E3fKae7YufOAVZuBg@mail.gmail.com>

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On Sun, 7 Apr 2013, Sebastian Feld wrote:

> Does FreeBSD support multiple page sizes in a single userland process
> like Solaris 11 does?

Superpage promotion happens automatically when consecutive data are 
accessed according to the proper heuristic.  As promotion is dynamic, 
necessarily a mixture of page sizes will be in use.  I'm not familiar with 
the Solaris 11 feature, so I can't say whether there is a direct parallel.

You may be interested in this talk by Kirk McKusick at BSDCan 2011 on the 
topic: http://www.youtube.com/watch?v=0wIxny-n_Mg

-Ben Kaduk



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