Re: A comment about changing kernels

[Marcus Brinkmann]

At Mon, 31 Oct 2005 22:53:43 -0500,
"Jonathan S. Shapiro" <address@hidden> wrote:
> 
> On Tue, 2005-11-01 at 01:22 +0100, Bernhard Kauer wrote:
> > > we may safely conclude that these CALL/RETURN patterns
> > > describe the overwhelming majority of IPCs -- all of the other patterns
> > > taken together accounted in EROS for less than 1% of all dynamic IPCs.
> > 
> > Is the CALL/RETURN pattern used for capability delegation (giving an cap
> > to another party) or only for usage of these capabilities?
> 
> For delegation, we tend to see a CALL/RETURN pair in which one of the
> arguments to the CALL is the capability being delegated.
> 
> However, these delegations are dynamically very rare in comparison to
> *uses* of capabilities. As an imperfect intuition: delegation tends to
> occur during program setup, but rarely during program steady-state
> execution. A delegation:use ratio of 1:100 or even 1:1000 would not be
> an unreasonable expectation.

Does this include capabilities returned in the return of the call?
Like, for example in dir_open?
 
Thanks,
Marcus