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Re: The problems for the rootless subhurd

From: olafBuddenhagen
Subject: Re: The problems for the rootless subhurd
Date: Fri, 15 May 2009 22:25:34 +0200
User-agent: Mutt/1.5.18 (2008-05-17)


On Mon, Apr 27, 2009 at 10:52:27AM +0100, Zheng Da wrote:

> But I wonder how you trace the source of these RPCs.
> >From the logging of 'boot', I can know what are the target tasks but
> >I
> cannot tell where are the RPCs from, because a task can send the RPC
> on the behalf of another task.

If you know what other tasks are interesting, you could trace all of
them individually...

(It would be nice in some situations if rpctrace could trace several
tasks at once -- but that's not exactly a trivial change :-) )

Tracing only one task, you can't know where the incoming RPCs come from.
This is by design: in a capability system, a task has no business
knowing where RPC is coming from/going to. *All* relevant information
should be bound to the capability, never to a process using it.


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