Re: [Qemu-devel] [PATCH v6 0/8] QEMU memory hot unplug support

[Zhu Guihua]

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On 04/02/2015 05:50 PM, Zhu Guihua wrote:
> This patchset adds support to hot unplug memory.
>
> Memory hot unplug is complicated multi-stage process. Unplug request callback
> sends remove request. After guest os processes ejection request, OSPM will
> execute _EJ0 to signal qemu that a device eject will be to occur. Then qemu
> will call unplug callback to eject the device.
>
> v6:
>   -improve documentation of memory hot unplug
>   -add trace event for device deletion
>   -put fix about "Memory device control fields" register in a separate patch
>
> v5:
>   -reorganize the patchset
>   -add documentation to understand patch easily
>   -add MEMORY_SLOT_EJECT for initiating device eject
>   -add support to send qmp event to notify mgmt about memory unplug error
>
> v4:
>   -reorganize the patchset
>   -drop the new API acpi_send_gpe_event()
>   -update ssdt-mem
>
> v3:
>   -commit message changes
>   -reorganize the patchset, squash and separate some patches
>   -update specs about acpi_mem_hotplug
>   -first cleanup external state, then un-map and un-register memory device
>
> v2:
>   -do a generic for acpi to send gpe event
>   -unparent object by PC_MACHINE
>   -update description in acpi_mem_hotplug.txt
>   -combine the last two patches in the last version
>   -cleanup external state in acpi_memory_unplug_cb
>
> Tang Chen (3):
>    acpi, mem-hotplug: add acpi_memory_slot_status() to get MemStatus
>    acpi, mem-hotplug: add unplug request cb for memory device
>    acpi, mem-hotplug: add unplug cb for memory device
>
> Zhu Guihua (5):
>    docs: update documentation for memory hot unplug
>    acpi: extend aml_field() to support UpdateRule
>    acpi: fix "Memory device control fields" register
>    acpi: add hardware implementation for memory hot unplug
>    qmp-event: add event notification for memory hot unplug error
>
>   docs/memory-hotplug.txt           | 23 ++++++++--
>   docs/qmp/qmp-events.txt           | 17 +++++++
>   docs/specs/acpi_mem_hotplug.txt   | 58 +++++++++++++++++++++--
>   hw/acpi/aml-build.c               |  4 +-
>   hw/acpi/ich9.c                    | 19 ++++++--
>   hw/acpi/memory_hotplug.c          | 96 ++++++++++++++++++++++++++++++++++++---
>   hw/acpi/piix4.c                   | 17 +++++--
>   hw/core/qdev.c                    |  2 +-
>   hw/i386/acpi-build.c              | 25 ++++++++--
>   hw/i386/acpi-dsdt-mem-hotplug.dsl | 13 +++++-
>   hw/i386/pc.c                      | 62 +++++++++++++++++++++++--
>   include/hw/acpi/aml-build.h       | 10 +++-
>   include/hw/acpi/memory_hotplug.h  | 12 +++++
>   include/hw/acpi/pc-hotplug.h      |  3 ++
>   include/hw/qdev-core.h            |  1 +
>   monitor.c                         |  1 +
>   qapi/event.json                   | 14 ++++++
>   trace-events                      |  4 ++
>   18 files changed, 346 insertions(+), 35 deletions(-)