Re: [Qemu-devel] [PATCH 0/3] re-enable balloon stats

[Dietmar Maurer]

> And personally, I think just having a stale value for stats-last-update is
> sufficient for error checking, but we can squirrel away an error in a 
> stats-last-
> error field if we want something more descriptive for clients, and just wipe 
> it
> out on the next successful update. Not sure whether we should clear the
> stats upon error or not, I think it might actually be useful to leave them. 
> If the
> guest crashed because we ballooned away too much memory or something
> for instance we'd be able to see the last value we logged.

I think the management app should cache the value if that is needed.