From: Paolo Bonzini <pbonzini@redhat.com>
To: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>,
qemu-devel@nongnu.org, imammedo@redhat.com, quintela@redhat.com,
amit.shah@redhat.com
Cc: guz.fnst@cn.fujitsu.com, izumi.taku@jp.fujitsu.com,
tangchen@cn.fujitsu.com
Subject: Re: [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support
Date: Mon, 30 Mar 2015 09:49:52 +0200 [thread overview]
Message-ID: <55190020.6020308@redhat.com> (raw)
In-Reply-To: <5518BAC6.4090906@cn.fujitsu.com>
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
next prev parent reply other threads:[~2015-03-30 7:50 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-27 9:20 [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support Zhu Guihua
2015-03-27 9:20 ` [Qemu-devel] [PATCH v5 1/7] docs: update documentation for memory hot unplug Zhu Guihua
2015-03-30 15:47 ` Igor Mammedov
2015-03-27 9:20 ` [Qemu-devel] [PATCH v5 2/7] acpi, mem-hotplug: add acpi_memory_slot_status() to get MemStatus Zhu Guihua
2015-03-27 9:20 ` [Qemu-devel] [PATCH v5 3/7] acpi, mem-hotplug: add unplug request cb for memory device Zhu Guihua
2015-04-01 8:23 ` Igor Mammedov
2015-03-27 9:20 ` [Qemu-devel] [PATCH v5 4/7] acpi, mem-hotplug: add unplug " Zhu Guihua
2015-03-27 9:20 ` [Qemu-devel] [PATCH v5 5/7] acpi: extend aml_field() to support UpdateRule Zhu Guihua
2015-04-01 8:39 ` Igor Mammedov
2015-03-27 9:20 ` [Qemu-devel] [PATCH v5 6/7] acpi: add hardware implementation for memory hot unplug Zhu Guihua
2015-03-30 9:09 ` Igor Mammedov
2015-03-27 9:20 ` [Qemu-devel] [PATCH v5 7/7] qmp-event: add event notification for memory hot unplug error Zhu Guihua
2015-03-27 14:53 ` Eric Blake
2015-03-30 3:07 ` Zhu Guihua
2015-03-30 2:53 ` [Qemu-devel] [PATCH v5 0/7] QEMU memory hot unplug support Zhu Guihua
2015-03-30 7:49 ` Paolo Bonzini [this message]
2015-04-01 8:42 ` Igor Mammedov
2015-04-01 9:43 ` Zhu Guihua
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