Re: [Xen-devel] [RFC] Xen requirments document

[Rik van Riel <riel@xxxxxxxxxx>]

On Sun, 17 Apr 2005, Mark Williamson wrote:

> > core.dynamic.memory - I'm not sure if it is possible yet to
> > boot a domain with less memory than its maximum, and grow
> > the domain's memory later through the balloon driver
> 
> It used to work but right now it seems to be broken (at least in the 
> unstable tree).

Hmmm, I'll look into it once I have xen working again
in rawhide - this is a part of the kernel I know well
enough.

> > we're missing an io.device.virt.discovery - in order to
> > be able to install into, and manage, a virtual machine,
> > the OS needs the ability to discover what virtual devices
> > are present - exporting through sysfs would work fine.
> > Since this is a requirement for many system administration
> > tools (eg. kudzu), this should probably be a Xen v3.0 target
> 
> They do appear in sysfs, though, don't they?  I remember that kudzu, 
> anaconda, etc. didn't recognise them but I never knew why...

The thing is that a device only shows up in sysfs when 
a driver for it is already loaded. There is no "xen bus"
that would allow kudzu to figure out which drivers to
load...

-- 
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan

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