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Re: A comment about changing kernels

From: Jonathan S. Shapiro
Subject: Re: A comment about changing kernels
Date: Mon, 31 Oct 2005 09:25:43 -0500

On Mon, 2005-10-31 at 11:39 +0100, Bernhard Kauer wrote:

> Perhaps I should give an example to make my statement clear:
> Suppose a client A want to transfer a capability to a session to client B.
> Client A can copy or map this capability to B and let B invoke the capbility
> to get a new session from the server S. Or A can call S and say: "give this
> capability to B". Both cases need independently of copy/map 4 IPC's.

You are using your assumptions to reason in a circle. If your protocol
did not presume that sessions were desirable, and that an update to the
badge is therefore necessary, you would conclude that a single COPY from
A to B is sufficient.


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