large pages

Chuck Swiger cswiger at
Mon Jul 2 01:39:52 UTC 2007

Wojciech Puchar wrote:
> does FreeBSD {can,will,patch exist} supports using huge pages? i mean 2M 
> pages on AMD64 and 2/4M pages on i386

I believe so, yes-- isn't this what the PAE kernel option does?

> i need freebsd just for running one program needing about 1280 megs of 
> data space (+1-2 meg of code stacks etc. can be normally mapped). 
> everything else is just using less than 1% of power.
> with 1536MB AMD64 machine it would be nice for FreeBSD to boot seeing 
> 256 megs for itself and allowing 1280 megs to be mapped&locked to just 
> one program.

Hmm.  Doesn't FreeBSD's default VM behavior do just fine dealing with one 
large active process without any unusual tuning?


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