I have been arranged a job related memory hotplug on ARM architecture. Maybe I know some new issues about memory hotplug on ARM architecture. I just enabled it on ARM, and it works well in my Android tablet now. However, I have not send out my patches. The real reason is that I don't know how to do it. Maybe I need to read "Documentation/SubmittingPatches".
Hi Andrew,
This is my first time to send you a e-mail. I am so nervous about if I have some mistakes or not.
Some peoples maybe think memory hotplug need to be supported by special hardware. Maybe it means memory physical hotplug. Some times, we just need to use memory logical hotplug, doesn't remove the memory in physical. It is also usefully for power saving in my platform. Because I doesn't want the offline memory is in self-refresh state.
Any comments are appreciated.
Thanks,
Jerry
2012/9/10 Vasilis Liaskovitis <vasilis.liaskovitis@xxxxxxxxxxxxxxxx>
Hi,
On Mon, Sep 10, 2012 at 10:01:44AM +0800, Wen Congyang wrote:
> At 09/10/2012 09:46 AM, Yasuaki Ishimatsu Wrote:
> > Hi Wen,
> >
> > 2012/09/01 5:49, Andrew Morton wrote:
> >> On Tue, 28 Aug 2012 18:00:07 +0800
> >> wency@xxxxxxxxxxxxxx wrote:
> >>
> >>> This patch series aims to support physical memory hot-remove.
> >>
> >> I doubt if many people have hardware which permits physical memorythe following repos contain the patchset above, plus 2 more patches that add
> >> removal? How would you suggest that people with regular hardware can
> >> test these chagnes?
> >
> > How do you test the patch? As Andrew says, for hot-removing memory,
> > we need a particular hardware. I think so too. So many people may want
> > to know how to test the patch.
> > If we apply following patch to kvm guest, can we hot-remove memory on
> > kvm guest?
> >
> > http://lists.gnu.org/archive/html/qemu-devel/2012-07/msg01389.html
>
> Yes, if we apply this patchset, we can test hot-remove memory on kvm guest.
> But that patchset doesn't implement _PS3, so there is some restriction.
PS3 support to the dimm devices in qemu/seabios:
https://github.com/vliaskov/seabios/commits/memhp-v2
https://github.com/vliaskov/qemu-kvm/commits/memhp-v2
I have not posted the PS3 patches yet in the qemu list, but will post them
soon for v3 of the memory hotplug series. If you have issues testing, let me
know.
thanks,
- Vasilis
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