| Message ID | 20200323143835.46117-1-roger.pau@citrix.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [OSSTEST] kernel-build: enable XEN_BALLOON_MEMORY_HOTPLUG | expand |
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@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
I will push this to pretest immediately.
Thanks,
Ian.
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@citrix.com> > > > > Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> > > > > 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? Thanks, Roger.
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@citrix.com> >>> >>> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> >>> >>> 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
diff --git a/ts-kernel-build b/ts-kernel-build index c976289e..89cdafcb 100755 --- a/ts-kernel-build +++ b/ts-kernel-build @@ -511,6 +511,7 @@ setopt CONFIG_XEN_KBDDEV_FRONTEND y setopt CONFIG_XEN_FBDEV_FRONTEND y setopt CONFIG_XEN_PCIDEV_FRONTEND y setopt CONFIG_XEN_BALLOON y +setopt CONFIG_XEN_BALLOON_MEMORY_HOTPLUG y setopt CONFIG_XEN_SCRUB_PAGES y setopt CONFIG_XEN_DEV_EVTCHN y setopt CONFIG_XEN_BACKEND y
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@citrix.com> --- ts-kernel-build | 1 + 1 file changed, 1 insertion(+)