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Re: [Qemu-devel] [RFC qom-cpu v4 00/10] i386: add cpu hot remove support
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [RFC qom-cpu v4 00/10] i386: add cpu hot remove support |
Date: |
Thu, 28 Nov 2013 15:41:39 +0100 |
On Wed, 9 Oct 2013 17:43:08 +0800
Chen Fan <address@hidden> wrote:
> Via implementing ACPI standard methods _EJ0 in bios, after Guest OS hot remove
> one vCPU, it is able to send a signal to QEMU, then QEMU could notify
> the assigned vCPU of exiting. meanwhile, and intruduce the QOM command
> 'cpu-del' to remove
> vCPU from QEMU itself.
have you tried following sequence:
cpu-add 1
cpu-add 2
cpu-del 1
and then do migration?
>
> this work is based on Andreas Färber's qom-cpu branch tree.
> git://github.com/afaerber/qemu-cpu.git
>
> this series patches must be used with seabios patch and KVM patch together.
>
> for KVM patches:
> http://comments.gmane.org/gmane.comp.emulators.kvm.devel/114347
>
> for seabios patches:
> http://comments.gmane.org/gmane.comp.emulators.qemu/230460
>
> Chen Fan (10):
> x86: move apic_state field from CPUX86State to X86CPU
> apic: remove redundant variable 'apic_no' from apic_init_common()
> apic: remove local_apics array and using CPU_FOREACH instead
> x86: add x86_cpu_unrealizefn() for cpu apic remove
> qmp: add 'cpu-del' command support
> qom cpu: rename variable 'cpu_added_notifier' to
> 'cpu_hotplug_notifier'
> qom cpu: add UNPLUG cpu notifier support
> i386: implement pc interface pc_hot_del_cpu()
> piix4: implement function cpu_status_write() for vcpu ejection
> cpus: reclaim allocated vCPU objects
>
> cpu-exec.c | 2 +-
> cpus.c | 51 +++++++++++++++++++++--
> hw/acpi/piix4.c | 66 ++++++++++++++++++++++++------
> hw/i386/kvm/apic.c | 18 +++++++-
> hw/i386/kvmvapic.c | 8 ++--
> hw/i386/pc.c | 51 ++++++++++++++++++-----
> hw/i386/pc_piix.c | 3 +-
> hw/intc/apic.c | 91
> ++++++++++++++++++++++-------------------
> hw/intc/apic_common.c | 17 ++------
> include/hw/boards.h | 2 +
> include/hw/i386/apic_internal.h | 6 +--
> include/hw/i386/pc.h | 1 +
> include/qom/cpu.h | 20 +++++++++
> include/sysemu/kvm.h | 1 +
> include/sysemu/sysemu.h | 2 +-
> kvm-all.c | 25 +++++++++++
> qapi-schema.json | 12 ++++++
> qmp-commands.hx | 23 +++++++++++
> qmp.c | 9 ++++
> qom/cpu.c | 26 +++++++++---
> target-i386/cpu-qom.h | 5 +++
> target-i386/cpu.c | 57 ++++++++++++++++++++------
> target-i386/cpu.h | 4 --
> target-i386/helper.c | 9 ++--
> target-i386/kvm.c | 23 +++++------
> target-i386/misc_helper.c | 8 ++--
> 26 files changed, 403 insertions(+), 137 deletions(-)
>
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Igor Mammedov <=