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Re: [Xen-devel] [PATCH v2 COLOPre 03/13] libxc/restore: zero ioreq page only one time
- To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>, Wen Congyang <wency@xxxxxxxxxxxxxx>, Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
- From: Yang Hongyang <yanghy@xxxxxxxxxxxxxx>
- Date: Thu, 11 Jun 2015 20:58:59 +0800
- Cc: Wei Liu <wei.liu2@xxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxx>, "guijianfeng@xxxxxxxxxxxxxx" <guijianfeng@xxxxxxxxxxxxxx>, "yunhong.jiang@xxxxxxxxx" <yunhong.jiang@xxxxxxxxx>, Eddie Dong <eddie.dong@xxxxxxxxx>, "rshriram@xxxxxxxxx" <rshriram@xxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxx>
- Delivery-date: Thu, 11 Jun 2015 12:59:15 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On 06/11/2015 06:20 PM, Paul Durrant wrote:
-----Original Message-----
From: Wen Congyang [mailto:wency@xxxxxxxxxxxxxx]
Sent: 11 June 2015 09:48
To: Paul Durrant; Andrew Cooper; Yang Hongyang; xen-devel@xxxxxxxxxxxxx
Cc: Wei Liu; Ian Campbell; guijianfeng@xxxxxxxxxxxxxx;
[...]
In our implementation, we don't start a new emulator. The codes can work,
but some bugs may be not triggered.
How do you reconcile the incoming QEMU save record with the running emulator
state?
We introduce a qmp command "xen-load-devices-state"(libxl__qmp_restore) which
can restore the emulator state. The step of resotre emulator state at a
checkpoint is:
1. libxl__qmp_stop -> vm_stop() in qemu
2. libxl__qmp_restore -> load_vmstate() in qemu
3. libxl__qmp_resume -> vm_start() in qemu
Paul
Thanks
Wen Congyang
Paul
Thanks
Wen Congyang
Paul
We will set to the guest to a new state, the old state should be
dropped.
Thanks
Wen Congyang
Paul
Thanks
Wen Congyang
Paul
Thanks
Wen Congyang
~Andrew
.
.
.
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--
Thanks,
Yang.
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