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Re: An idea and proposal about system time

From: olafBuddenhagen
Subject: Re: An idea and proposal about system time
Date: Sat, 17 Feb 2007 07:39:22 +0100
User-agent: Mutt/1.5.13 (2006-08-11)


On Fri, Feb 16, 2007 at 02:44:46PM +0100, Thomas Schwinge wrote:

> An open issue to me so far is if we can find an efficient way to
> continue providing `libshouldbeinlibc''s `maptime' interface.

The real question to ask is: Why did the original Mach designers pay so
much attention to an efficient way of getting the system time -- and are
their reasons relevant to us?

If the answer is that they aren't, I guess your proposal is fine, and
maptime() can really be dropped alltogether. If the the anser is that
they might be, your proposal could be problematic. (I guess you can map
the memory region from the server just as well, but time updates might
be less reliable when done in a server instead of the kernel...)

My guess is the former, but it would be good to know for sure...


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