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Re: I/O permission control in OSKit-Mach

From: Marcus Brinkmann
Subject: Re: I/O permission control in OSKit-Mach
Date: Tue, 16 Oct 2001 13:27:15 +0200
User-agent: Mutt/1.3.22i

On Tue, Oct 16, 2001 at 11:06:53AM +0000, Adam Olsen wrote:
> I can't
> think of any reason that we'd want segments larger than the smallest
> value we can manage.

Simplicity.  The smallest value we can handle is a bit, and this is the
bitmap we have already.  However, instead searching for bits that have to be
modified, we are simply copying everything right now.  I like the idea of
only copying 256 bytes instead 8192, but I don't like any more sophisticated
segmentation, because this means that one has the overhead of another real
bitmap, that needs to be allocated, free'd and maintained.  The segment map
should fit into a single basic type, like an uint32_t, everything else is
overkill IMO.


`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann              GNU    http://www.gnu.org    marcus@gnu.org

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