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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

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.


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