Re: [Xen-devel] Re: Timeout connecting to device

[Rusty Russell <rusty@xxxxxxxxxxxxxxx>]

On Fri, 2005-08-26 at 11:37 +0100, Christian Limpach wrote:
> On Fri, Aug 26, 2005 at 10:27:06AM +1000, Rusty Russell wrote:
> > A slight variation on this would be to have the tools create the
> > "setting-up" node, and the driver delete it when it's happy.
> > 
> > I want to leave the error node on every error, so that way you can tell
> > if it can't read the backend because of permission problem or something,
> > even if during setup.
> 
> How do you tell if an error is final though?  Removing the setting-up
> node sounds kind of misleading since the device is not done setting-up.
> I think we need to indicate somehow whether an error is final or
> transient, but I don't think we should require the format of the
> error message to somehow indicate this.

I don't think the frontend can, in general, tell the difference between
a final error and a transient one.  The problem may simply be that the
backend never creates a node we need.  If we're completely giving up, we
could remove the setting-up node, but I'm not sure it's worth it?

Rusty.
-- 
A bad analogy is like a leaky screwdriver -- Richard Braakman


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