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Re: [Qemu-ppc] [Qemu-devel] [RFC PATCH v4 00/11] sPAPR CPU hotplug
From: |
Bharata B Rao |
Subject: |
Re: [Qemu-ppc] [Qemu-devel] [RFC PATCH v4 00/11] sPAPR CPU hotplug |
Date: |
Mon, 10 Aug 2015 09:01:26 +0530 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Thu, Aug 06, 2015 at 04:42:05PM +0800, Zhu Guihua wrote:
>
> On 08/06/2015 01:27 PM, Bharata B Rao wrote:
> >Hi,
> >
> >This is the next version of CPU hotplug support patchset for PowerPC
> >sPAPR guests. This is a split-out from the previous version (v3) that
> >was carrying CPU and memory hotplug together. This patchset applies on
> >spapr-next branch of David Gibson's tree.
> >
> >In the previous version, I was doing CPU addition at socket granularity.
> >One hotplug request would add one complete CPU socket with all the cores
> >and threads as per the boot time topology specification. Based on the
> >feedback for v3, I am switching back to earlier method wherein I don't
> >have the notion of socket device. In this version I don't create any
> >additional device abstraction over CPU device, but use the existing
> >CPU device and add full cores at once. One hotplug request will add
> >a complete core with all the underlying threads.
>
> So the new generic infrastructure is generic socket or generic core?
In this implementation, it is neither, meaning it is not generic as you
can see from the device_add semantics at the end of this mail.
>
> Cc: Andreas
> What about hot-adding a core device for x86 too? Hot-plug per core seems to
> handle all cases.
>
> thanks,
> Zhu
>
> >I have enabled device_add based hotplug for POWER8 family for processors
> >and currently the semantics looks like this:
> >
> >(qemu) device_add POWER8-powerpc64-cpu,id=cpu8
- [Qemu-ppc] [RFC PATCH v4 05/11] xics_kvm: Add cpu_destroy method to XICS, (continued)
- [Qemu-ppc] [RFC PATCH v4 05/11] xics_kvm: Add cpu_destroy method to XICS, Bharata B Rao, 2015/08/06
- [Qemu-ppc] [RFC PATCH v4 07/11] spapr: Enable CPU hotplug for pseries-2.5 and add CPU DRC DT entries, Bharata B Rao, 2015/08/06
- [Qemu-ppc] [RFC PATCH v4 01/11] exec: Remove cpu from cpus list during cpu_exec_exit(), Bharata B Rao, 2015/08/06
- [Qemu-ppc] [RFC PATCH v4 03/11] cpus: Reclaim vCPU objects, Bharata B Rao, 2015/08/06
- [Qemu-ppc] [RFC PATCH v4 04/11] cpus: Add a sync version of cpu_remove(), Bharata B Rao, 2015/08/06
- [Qemu-ppc] [RFC PATCH v4 10/11] spapr: CPU hot unplug support, Bharata B Rao, 2015/08/06
- [Qemu-ppc] [RFC PATCH v4 09/11] spapr: Support topologies with unfilled cores, Bharata B Rao, 2015/08/06
- [Qemu-ppc] [RFC PATCH v4 08/11] spapr: CPU hotplug support, Bharata B Rao, 2015/08/06
- Re: [Qemu-ppc] [Qemu-devel] [RFC PATCH v4 00/11] sPAPR CPU hotplug, Zhu Guihua, 2015/08/06
- Re: [Qemu-ppc] [Qemu-devel] [RFC PATCH v4 00/11] sPAPR CPU hotplug,
Bharata B Rao <=
- Re: [Qemu-ppc] [RFC PATCH v4 00/11] sPAPR CPU hotplug, David Gibson, 2015/08/11