Re: [Xen-devel] [PATCH OSSTEST] kernel-build: enable XEN_BALLOON_MEMORY_HOTPLUG

[Jürgen Groß <jgross@xxxxxxxx>]

On 24.03.20 13:00, Roger Pau Monné wrote:
> Adding Juergen and Boris for feedback.
>
> On Tue, Mar 24, 2020 at 11:57:48AM +0000, Ian Jackson wrote:
> > Ian Jackson writes ("Re: [PATCH OSSTEST] kernel-build: enable 
> > XEN_BALLOON_MEMORY_HOTPLUG"):
> > > Roger Pau Monne writes ("[PATCH OSSTEST] kernel-build: enable 
> > > XEN_BALLOON_MEMORY_HOTPLUG"):
> > > > This allows a PVH/HVM domain to use unpopulated memory ranges to map
> > > > foreign memory or grants, and is required for a PVH dom0 to function
> > > > properly.
> > > >
> > > > Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> > > Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> > >
> > > I will push this to pretest immediately.
> > Now done.  Would you consider whether the default should be changed
> > in Linux and prepare a patch to do so if appropriate ?
> DYK if there's any reason why this is not on by default?
AFAIK the default has been off since introduction in 2011.

I don't know the reason for that.


Juergen