Re: [Xen-devel] [PATCH 2/4] sysctl/libxl: Add interface for returning IO topology data

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

> > > Additionally please add IN and OUT annotations. When I first saw
> > > this I assumed they would all be OUT (in which case the long running
> > > loop problem mentioned in the reply to one of the other patches
> > > wouldn't have been there), matching their CPU counterpart...
> > I don't follow this. Are you saying that if ti->max_devs in patch 3/4 is
> > an IN (which it is) then we don't have to guard for long-running loops?
> If they were all OUT then there wouldn't be a way for the entire
> operation to be fooled into going over more devices than there are
> in the system.
Assuming I add continuations to the loop, too many devices wouldn't be a 
problem for the hypervisor, would it? If an unreasonable number is 
provided then eventually copy_from_guest() will fault.
-boris

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