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Re: [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support

From: Zhu Guihua
Subject: Re: [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support
Date: Mon, 30 Mar 2015 10:53:58 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0


When migrating from old qemu to one with this hot remove feature, I found
this feature would not work any more in new qemu.

The reason is that DSDT table will not re-generate in new qemu when migration.
So the hot remove will not work in the new qemu even though qemu
has this feature.

Is it possible to re-generate dsdt table when migration?


On 03/27/2015 05:20 PM, Zhu Guihua wrote:
Memory hot unplug are both asynchronous procedures.
When the unplug operation happens, unplug request cb is called first.
And when guest OS finished handling unplug, unplug cb will be called
to do the real removal of device.

  -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

  -reorganize the patchset
  -drop the new API acpi_send_gpe_event()
  -update ssdt-mem

  -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

  -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 (4):
   docs: update documentation for memory hot unplug
   acpi: extend aml_field() to support UpdateRule
   acpi: add hardware implementation for memory hot unplug
   qmp-event: add event notification for memory hot unplug error

  docs/memory-hotplug.txt           | 24 ++++++++--
  docs/qmp/qmp-events.txt           | 17 +++++++
  docs/specs/acpi_mem_hotplug.txt   | 32 ++++++++++++--
  hw/acpi/aml-build.c               |  4 +-
  hw/acpi/ich9.c                    | 19 ++++++--
  hw/acpi/memory_hotplug.c          | 93 ++++++++++++++++++++++++++++++++++++---
  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                      |  2 +
  18 files changed, 315 insertions(+), 36 deletions(-)

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