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Date: Tue, 10 Jul 2001 12:03:44 -0500
From: Timur Tabi <ttabi@interactivesi.com>
Organization: Interactive Silicon
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Subject: Re: What is the truth about Linux 2.4's RAM limitations?
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Chris Wedgwood wrote:

>How does FreeBSD do this? What about other OSs? Do they map out most
>of userland on syscall entry and map it in as required for their
>equivalents to copy_to/from_user? (Taking the performance hit in doing
>so?)
>

I don't know about *BSD, but in Windows NT/2000, even drivers run in 
virtual space.  The OS is not monolithic, so address spaces are general 
not "shared" as they are in Linux.

-- 
Timur Tabi
Interactive Silicon



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