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Re: [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support |
Date: |
Mon, 30 Mar 2015 09:49:52 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
On 30/03/2015 04:53, Zhu Guihua wrote:
> Question:
>
> 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?
No, consider the case when the OS is _executing_ the DSDT table during
migration!
You can either ignore the issue, or disable hot-unplug for older machine
types---that is, only enable it for pc-2.4. Then you'll get consistent
behavior wherever the VM is started in a cluster.
Paolo
- [Qemu-devel] [PATCH v5 2/7] acpi, mem-hotplug: add acpi_memory_slot_status() to get MemStatus, (continued)
- [Qemu-devel] [PATCH v5 2/7] acpi, mem-hotplug: add acpi_memory_slot_status() to get MemStatus, Zhu Guihua, 2015/03/27
- [Qemu-devel] [PATCH v5 3/7] acpi, mem-hotplug: add unplug request cb for memory device, Zhu Guihua, 2015/03/27
- [Qemu-devel] [PATCH v5 6/7] acpi: add hardware implementation for memory hot unplug, Zhu Guihua, 2015/03/27
- [Qemu-devel] [PATCH v5 5/7] acpi: extend aml_field() to support UpdateRule, Zhu Guihua, 2015/03/27
- [Qemu-devel] [PATCH v5 7/7] qmp-event: add event notification for memory hot unplug error, Zhu Guihua, 2015/03/27
- [Qemu-devel] [PATCH v5 4/7] acpi, mem-hotplug: add unplug cb for memory device, Zhu Guihua, 2015/03/27
- Re: [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support, Zhu Guihua, 2015/03/29
- Re: [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support,
Paolo Bonzini <=