Re: [Xen-devel] lowest limit for balloon?

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 18 Jul 2005, at 17:12, Mark Williamson wrote:

> > I know that it's really difficult to determine how low is too low.
> > Could I recommend a small interface change though, that would force 
> > the
> > user to always specify units {B,K,M,...}?  That might help a little at
> > least.
> That sounds like it should rule out most accidental errors.  Whilst 
> it's not
> quite so raw, /proc interfaces tend to be a bit high level anyhow...
>
> As an alternative, I guess we could introduce a guest-internal 
> ballooning tool
> - this could incorporate all the safety checks and user-friendliness 
> (the
> same or similar checks should be used in the xm tool for the node 
> admin).
Really, if you want to safely balloon inside a guest VM, is it so hard 
to write a tiny script to ensure a 'sane' value is passed to the /proc 
interface?
The /proc interface is only really text read/write so that accesses are 
scriptable. If you go straight at it and mess it up, I think that is 
tough luck.
 -- Keir


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